Search a number
-
+
1330005991 = 26314333529
BaseRepresentation
bin100111101000110…
…0100011111100111
310102200122022020011
41033101210133213
510210440142431
6335550351051
744646602326
oct11721443747
93380568204
101330005991
11622832206
123114bb487
131827128c2
14c88d20bd
157bb6acb1
hex4f4647e7

1330005991 has 8 divisors (see below), whose sum is σ = 1336373280. Its totient is φ = 1323649152.

The previous prime is 1330005983. The next prime is 1330006003. The reversal of 1330005991 is 1995000331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1330005991 - 23 = 1330005983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330005961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375115 + ... + 378643.

It is an arithmetic number, because the mean of its divisors is an integer number (167046660).

Almost surely, 21330005991 is an apocalyptic number.

1330005991 is a deficient number, since it is larger than the sum of its proper divisors (6367289).

1330005991 is a wasteful number, since it uses less digits than its factorization.

1330005991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 1330005991 is about 36469.2471954111. The cubic root of 1330005991 is about 1099.7261001242.

The spelling of 1330005991 in words is "one billion, three hundred thirty million, five thousand, nine hundred ninety-one".

Divisors: 1 263 1433 3529 376879 928127 5057057 1330005991