259457891 has 16 divisors (see below), whose sum is σ = 330086400. Its totient is φ = 202172040.

The previous prime is 259457837. The next prime is 259457897. The reversal of 259457891 is 198754952.

It is a de Polignac number, because none of the positive numbers 2^k-259457891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259457897) 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, 30611 + ... + 38156.

It is an arithmetic number, because the mean of its divisors is an integer number (20630400).

Almost surely, 2^259457891 is an apocalyptic number.

259457891 is a deficient number, since it is larger than the sum of its proper divisors (70628509).

259457891 is an equidigital number, since it uses as much as digits as its factorization.

259457891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68799 (or 68785 counting only the distinct ones).

The product of its digits is 907200, while the sum is 50.

The square root of 259457891 is about 16107.6966385638. The cubic root of 259457891 is about 637.8065298140.

The spelling of 259457891 in words is "two hundred fifty-nine million, four hundred fifty-seven thousand, eight hundred ninety-one".