85691157 has 4 divisors (see below), whose sum is σ = 114254880. Its totient is φ = 57127436.

The previous prime is 85691147. The next prime is 85691173. The reversal of 85691157 is 75119658.

85691157 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85691157 - 2⁶ = 85691093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85691147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14281857 + ... + 14281862.

It is an arithmetic number, because the mean of its divisors is an integer number (28563720).

Almost surely, 2^85691157 is an apocalyptic number.

It is an amenable number.

85691157 is a deficient number, since it is larger than the sum of its proper divisors (28563723).

85691157 is a wasteful number, since it uses less digits than its factorization.

85691157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28563722.

The product of its digits is 75600, while the sum is 42.

The square root of 85691157 is about 9256.9518201188. The cubic root of 85691157 is about 440.8714769885.

The spelling of 85691157 in words is "eighty-five million, six hundred ninety-one thousand, one hundred fifty-seven".