85258279 has 2 divisors, whose sum is σ = 85258280. Its totient is φ = 85258278.

The previous prime is 85258273. The next prime is 85258307. The reversal of 85258279 is 97285258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85258279 - 2¹⁹ = 84733991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85258273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42629139 + 42629140.

It is an arithmetic number, because the mean of its divisors is an integer number (42629140).

Almost surely, 2^85258279 is an apocalyptic number.

85258279 is a deficient number, since it is larger than the sum of its proper divisors (1).

85258279 is an equidigital number, since it uses as much as digits as its factorization.

85258279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 46.

The square root of 85258279 is about 9233.5409784113. The cubic root of 85258279 is about 440.1278536853.

The spelling of 85258279 in words is "eighty-five million, two hundred fifty-eight thousand, two hundred seventy-nine".