85157997 has 8 divisors (see below), whose sum is σ = 114179040. Its totient is φ = 56454480.

The previous prime is 85157987. The next prime is 85157999. The reversal of 85157997 is 79975158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85157997 - 2⁷ = 85157869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85157999) 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 7 ways as a sum of consecutive naturals, for example, 78754 + ... + 79827.

It is an arithmetic number, because the mean of its divisors is an integer number (14272380).

Almost surely, 2^85157997 is an apocalyptic number.

It is an amenable number.

85157997 is a deficient number, since it is larger than the sum of its proper divisors (29021043).

85157997 is a wasteful number, since it uses less digits than its factorization.

85157997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158763.

The product of its digits is 793800, while the sum is 51.

The square root of 85157997 is about 9228.1090695765. The cubic root of 85157997 is about 439.9552244382.

The spelling of 85157997 in words is "eighty-five million, one hundred fifty-seven thousand, nine hundred ninety-seven".