85120177 has 4 divisors (see below), whose sum is σ = 87099760. Its totient is φ = 83140596.

The previous prime is 85120169. The next prime is 85120181. The reversal of 85120177 is 77102158.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85120177 - 2³ = 85120169 is a prime.

It is a super-2 number, since 2×85120177² = 14490889065022658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85120577) 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, 989727 + ... + 989812.

It is an arithmetic number, because the mean of its divisors is an integer number (21774940).

Almost surely, 2^85120177 is an apocalyptic number.

It is an amenable number.

85120177 is a deficient number, since it is larger than the sum of its proper divisors (1979583).

85120177 is a wasteful number, since it uses less digits than its factorization.

85120177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979582.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 85120177 is about 9226.0596681357. The cubic root of 85120177 is about 439.8900844591.

The spelling of 85120177 in words is "eighty-five million, one hundred twenty thousand, one hundred seventy-seven".