258332491 has 2 divisors, whose sum is σ = 258332492. Its totient is φ = 258332490.

The previous prime is 258332489. The next prime is 258332509. The reversal of 258332491 is 194233852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258332491 - 2¹ = 258332489 is a prime.

Together with 258332489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 258332491.

It is not a weakly prime, because it can be changed into another prime (258332411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129166245 + 129166246.

It is an arithmetic number, because the mean of its divisors is an integer number (129166246).

Almost surely, 2^258332491 is an apocalyptic number.

258332491 is a deficient number, since it is larger than the sum of its proper divisors (1).

258332491 is an equidigital number, since it uses as much as digits as its factorization.

258332491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 258332491 is about 16072.7250645309. The cubic root of 258332491 is about 636.8830302097.

The spelling of 258332491 in words is "two hundred fifty-eight million, three hundred thirty-two thousand, four hundred ninety-one".