77312117 has 4 divisors (see below), whose sum is σ = 77564256. Its totient is φ = 77059980.

The previous prime is 77312111. The next prime is 77312119. The reversal of 77312117 is 71121377.

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 77312117 - 2²⁰ = 76263541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77312117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77312111) 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, 125609 + ... + 126222.

It is an arithmetic number, because the mean of its divisors is an integer number (19391064).

Almost surely, 2^77312117 is an apocalyptic number.

It is an amenable number.

77312117 is a deficient number, since it is larger than the sum of its proper divisors (252139).

77312117 is a wasteful number, since it uses less digits than its factorization.

77312117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252138.

The product of its digits is 2058, while the sum is 29.

The square root of 77312117 is about 8792.7309182074. The cubic root of 77312117 is about 426.0061366276.

The spelling of 77312117 in words is "seventy-seven million, three hundred twelve thousand, one hundred seventeen".