77212113 has 16 divisors (see below), whose sum is σ = 118915776. Its totient is φ = 44042240.

The previous prime is 77212087. The next prime is 77212139. The reversal of 77212113 is 31121277.

It is an interprime number because it is at equal distance from previous prime (77212087) and next prime (77212139).

It is not a de Polignac number, because 77212113 - 2²² = 73017809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77212183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68256 + ... + 69377.

It is an arithmetic number, because the mean of its divisors is an integer number (7432236).

Almost surely, 2^77212113 is an apocalyptic number.

It is an amenable number.

77212113 is a deficient number, since it is larger than the sum of its proper divisors (41703663).

77212113 is a wasteful number, since it uses less digits than its factorization.

77212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137664.

The product of its digits is 588, while the sum is 24.

The square root of 77212113 is about 8787.0423351660. The cubic root of 77212113 is about 425.8223763004.

The spelling of 77212113 in words is "seventy-seven million, two hundred twelve thousand, one hundred thirteen".