77213967 has 16 divisors (see below), whose sum is σ = 113084160. Its totient is φ = 46645632.

The previous prime is 77213959. The next prime is 77213971. The reversal of 77213967 is 76931277.

It is not a de Polignac number, because 77213967 - 2³ = 77213959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77213957) 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, 28138 + ... + 30759.

It is an arithmetic number, because the mean of its divisors is an integer number (7067760).

Almost surely, 2^77213967 is an apocalyptic number.

77213967 is a deficient number, since it is larger than the sum of its proper divisors (35870193).

77213967 is a wasteful number, since it uses less digits than its factorization.

77213967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58942.

The product of its digits is 111132, while the sum is 42.

The square root of 77213967 is about 8787.1478307810. The cubic root of 77213967 is about 425.8257845237.

The spelling of 77213967 in words is "seventy-seven million, two hundred thirteen thousand, nine hundred sixty-seven".