85977169 has 4 divisors (see below), whose sum is σ = 86198580. Its totient is φ = 85755760.

The previous prime is 85977161. The next prime is 85977179. The reversal of 85977169 is 96177958.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62094400 + 23882769 = 7880^2 + 4887^2 .

It is a cyclic number.

It is not a de Polignac number, because 85977169 - 2³ = 85977161 is a prime.

It is a super-2 number, since 2×85977169² = 14784147178509122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85977161) 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, 110122 + ... + 110899.

It is an arithmetic number, because the mean of its divisors is an integer number (21549645).

Almost surely, 2^85977169 is an apocalyptic number.

It is an amenable number.

85977169 is a deficient number, since it is larger than the sum of its proper divisors (221411).

85977169 is a wasteful number, since it uses less digits than its factorization.

85977169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221410.

The product of its digits is 952560, while the sum is 52.

The square root of 85977169 is about 9272.3874487642. The cubic root of 85977169 is about 441.3614322649.

The spelling of 85977169 in words is "eighty-five million, nine hundred seventy-seven thousand, one hundred sixty-nine".