85017977 has 4 divisors (see below), whose sum is σ = 92746896. Its totient is φ = 77289060.

The previous prime is 85017949. The next prime is 85018039. The reversal of 85017977 is 77971058.

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 85017977 - 2⁸ = 85017721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85017277) 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, 3864443 + ... + 3864464.

It is an arithmetic number, because the mean of its divisors is an integer number (23186724).

Almost surely, 2^85017977 is an apocalyptic number.

It is an amenable number.

85017977 is a deficient number, since it is larger than the sum of its proper divisors (7728919).

85017977 is a wasteful number, since it uses less digits than its factorization.

85017977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728918.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 85017977 is about 9220.5193454599. The cubic root of 85017977 is about 439.7139618179.

The spelling of 85017977 in words is "eighty-five million, seventeen thousand, nine hundred seventy-seven".