Search a number
-
+
194707801 = 19371032689
BaseRepresentation
bin10111001101100…
…00000101011001
3111120101011220001
423212300011121
5344321122201
631153133001
74552663141
oct1346600531
9446334801
10194707801
119a9a8942
125525a161
1331453522
141bc05921
1512161301
hexb9b0159

194707801 has 16 divisors (see below), whose sum is σ = 212617600. Its totient is φ = 177666048.

The previous prime is 194707697. The next prime is 194707819. The reversal of 194707801 is 108707491.

It is a 4-Lehmer number, since φ(194707801) divides (194707801-1)4.

It is a cyclic number.

It is not a de Polignac number, because 194707801 - 217 = 194576729 is a prime.

It is a super-2 number, since 2×1947078012 = 75822255540511202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a deceptive number, since it divides R194707800.

It is not an unprimeable number, because it can be changed into a prime (194707831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71065 + ... + 73753.

It is an arithmetic number, because the mean of its divisors is an integer number (13288600).

Almost surely, 2194707801 is an apocalyptic number.

It is an amenable number.

194707801 is a deficient number, since it is larger than the sum of its proper divisors (17909799).

194707801 is a wasteful number, since it uses less digits than its factorization.

194707801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 194707801 is about 13953.7737189622. The cubic root of 194707801 is about 579.5992088407.

The spelling of 194707801 in words is "one hundred ninety-four million, seven hundred seven thousand, eight hundred one".

Divisors: 1 19 37 103 703 1957 2689 3811 51091 72409 99493 276967 1890367 5262373 10247779 194707801