77975617 has 8 divisors (see below), whose sum is σ = 82639872. Its totient is φ = 73320000.

The previous prime is 77975609. The next prime is 77975669. The reversal of 77975617 is 71657977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77975617 - 2³ = 77975609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77975917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31992 + ... + 34342.

It is an arithmetic number, because the mean of its divisors is an integer number (10329984).

Almost surely, 2^77975617 is an apocalyptic number.

It is an amenable number.

77975617 is a deficient number, since it is larger than the sum of its proper divisors (4664255).

77975617 is a wasteful number, since it uses less digits than its factorization.

77975617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319.

The product of its digits is 648270, while the sum is 49.

The square root of 77975617 is about 8830.3803428844. The cubic root of 77975617 is about 427.2213420612.

The spelling of 77975617 in words is "seventy-seven million, nine hundred seventy-five thousand, six hundred seventeen".