85131764 has 12 divisors (see below), whose sum is σ = 149562084. Its totient is φ = 42399744.

The previous prime is 85131737. The next prime is 85131817. The reversal of 85131764 is 46713158.

It can be written as a sum of positive squares in 2 ways, for example, as 75829264 + 9302500 = 8708^2 + 3050^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40379 + ... + 42434.

It is an arithmetic number, because the mean of its divisors is an integer number (12463507).

Almost surely, 2^85131764 is an apocalyptic number.

It is an amenable number.

85131764 is a deficient number, since it is larger than the sum of its proper divisors (64430320).

85131764 is a wasteful number, since it uses less digits than its factorization.

85131764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83074 (or 83072 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 85131764 is about 9226.6875963154. The cubic root of 85131764 is about 439.9100435935.

The spelling of 85131764 in words is "eighty-five million, one hundred thirty-one thousand, seven hundred sixty-four".