259938891 has 12 divisors (see below), whose sum is σ = 397553832. Its totient is φ = 163098816.

The previous prime is 259938869. The next prime is 259938907. The reversal of 259938891 is 198839952.

259938891 is a `hidden beast` number, since 259 + 9 + 388 + 9 + 1 = 666.

It is not a de Polignac number, because 259938891 - 2⁵ = 259938859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (259938821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 849321 + ... + 849626.

It is an arithmetic number, because the mean of its divisors is an integer number (33129486).

Almost surely, 2^259938891 is an apocalyptic number.

259938891 is a deficient number, since it is larger than the sum of its proper divisors (137614941).

259938891 is a wasteful number, since it uses less digits than its factorization.

259938891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698970 (or 1698967 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 259938891 is about 16122.6204755927. The cubic root of 259938891 is about 638.2004223198.

The spelling of 259938891 in words is "two hundred fifty-nine million, nine hundred thirty-eight thousand, eight hundred ninety-one".