85979900 has 18 divisors (see below), whose sum is σ = 186576600. Its totient is φ = 34391920.

The previous prime is 85979869. The next prime is 85979903. The reversal of 85979900 is 997958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85979903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 429800 + ... + 429999.

Almost surely, 2^85979900 is an apocalyptic number.

It is an amenable number.

85979900 is an abundant number, since it is smaller than the sum of its proper divisors (100596700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85979900 is a wasteful number, since it uses less digits than its factorization.

85979900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859813 (or 859806 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 85979900 is about 9272.5347127956. The cubic root of 85979900 is about 441.3661053866.

The spelling of 85979900 in words is "eighty-five million, nine hundred seventy-nine thousand, nine hundred".