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194068069 = 13109151907
BaseRepresentation
bin10111001000100…
…11111001100101
3111112011200100021
423210103321211
5344140134234
631131315141
74544360056
oct1344237145
9445150307
10194068069
119a601238
1254babab1
133128b2a0
141baba72d
15120869b4
hexb913e65

194068069 has 16 divisors (see below), whose sum is σ = 212544640. Its totient is φ = 176126400.

The previous prime is 194068067. The next prime is 194068079. The reversal of 194068069 is 960860491.

It is not a de Polignac number, because 194068069 - 21 = 194068067 is a prime.

It is a super-2 number, since 2×1940680692 = 75324830810777522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194068067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213514 + ... + 214420.

It is an arithmetic number, because the mean of its divisors is an integer number (13284040).

Almost surely, 2194068069 is an apocalyptic number.

It is an amenable number.

194068069 is a deficient number, since it is larger than the sum of its proper divisors (18476571).

194068069 is a wasteful number, since it uses less digits than its factorization.

194068069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 194068069 is about 13930.8315975752. The cubic root of 194068069 is about 578.9637352588.

The spelling of 194068069 in words is "one hundred ninety-four million, sixty-eight thousand, sixty-nine".

Divisors: 1 13 109 151 907 1417 1963 11791 16459 98863 136957 213967 1285219 1780441 14928313 194068069