85107591 has 12 divisors (see below), whose sum is σ = 127486632. Its totient is φ = 56738232.

The previous prime is 85107577. The next prime is 85107599. The reversal of 85107591 is 19570158.

It is not a de Polignac number, because 85107591 - 2¹⁴ = 85091207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85107599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174876 + ... + 175361.

It is an arithmetic number, because the mean of its divisors is an integer number (10623886).

Almost surely, 2^85107591 is an apocalyptic number.

85107591 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

85107591 is a deficient number, since it is larger than the sum of its proper divisors (42379041).

85107591 is an equidigital number, since it uses as much as digits as its factorization.

85107591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350252 (or 350240 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 85107591 is about 9225.3775532495. The cubic root of 85107591 is about 439.8684024494.

The spelling of 85107591 in words is "eighty-five million, one hundred seven thousand, five hundred ninety-one".