858259979 has 2 divisors, whose sum is σ = 858259980. Its totient is φ = 858259978.

The previous prime is 858259949. The next prime is 858260023. The reversal of 858259979 is 979952858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 858259979 - 2⁸ = 858259723 is a prime.

It is a super-2 number, since 2×858259979² = 1473220383106160882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (858259939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429129989 + 429129990.

It is an arithmetic number, because the mean of its divisors is an integer number (429129990).

Almost surely, 2^858259979 is an apocalyptic number.

858259979 is a deficient number, since it is larger than the sum of its proper divisors (1).

858259979 is an equidigital number, since it uses as much as digits as its factorization.

858259979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 62.

The square root of 858259979 is about 29296.0744639960. The cubic root of 858259979 is about 950.3267496524.

The spelling of 858259979 in words is "eight hundred fifty-eight million, two hundred fifty-nine thousand, nine hundred seventy-nine".