85977859 has 4 divisors (see below), whose sum is σ = 93794040. Its totient is φ = 78161680.

The previous prime is 85977847. The next prime is 85977877. The reversal of 85977859 is 95877958.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85977859 - 2²³ = 77589251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85977259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3908074 + ... + 3908095.

It is an arithmetic number, because the mean of its divisors is an integer number (23448510).

Almost surely, 2^85977859 is an apocalyptic number.

85977859 is a deficient number, since it is larger than the sum of its proper divisors (7816181).

85977859 is a wasteful number, since it uses less digits than its factorization.

85977859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816180.

The product of its digits is 6350400, while the sum is 58.

The square root of 85977859 is about 9272.4246559355. The cubic root of 85977859 is about 441.3626129605.

Subtracting 85977859 from its reverse (95877958), we obtain a palindrome (9900099).

The spelling of 85977859 in words is "eighty-five million, nine hundred seventy-seven thousand, eight hundred fifty-nine".