258779191 has 6 divisors (see below), whose sum is σ = 284443376. Its totient is φ = 235253700.

The previous prime is 258779173. The next prime is 258779197. The reversal of 258779191 is 191977852.

It is not a de Polignac number, because 258779191 - 2⁷ = 258779063 is a prime.

It is a super-2 number, since 2×258779191² = 133933339389228962, 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 (258779197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1069215 + ... + 1069456.

Almost surely, 2^258779191 is an apocalyptic number.

258779191 is a deficient number, since it is larger than the sum of its proper divisors (25664185).

258779191 is a wasteful number, since it uses less digits than its factorization.

258779191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138693 (or 2138682 counting only the distinct ones).

The product of its digits is 317520, while the sum is 49.

The square root of 258779191 is about 16086.6152748178. The cubic root of 258779191 is about 637.2499111824.

The spelling of 258779191 in words is "two hundred fifty-eight million, seven hundred seventy-nine thousand, one hundred ninety-one".