77916937 has 4 divisors (see below), whose sum is σ = 89047936. Its totient is φ = 66785940.

The previous prime is 77916911. The next prime is 77916941. The reversal of 77916937 is 73961977.

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 77916937 - 2⁷ = 77916809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77916037) 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, 5565489 + ... + 5565502.

It is an arithmetic number, because the mean of its divisors is an integer number (22261984).

Almost surely, 2^77916937 is an apocalyptic number.

It is an amenable number.

77916937 is a deficient number, since it is larger than the sum of its proper divisors (11130999).

77916937 is a wasteful number, since it uses less digits than its factorization.

77916937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130998.

The product of its digits is 500094, while the sum is 49.

The square root of 77916937 is about 8827.0570973570. The cubic root of 77916937 is about 427.1141476991.

The spelling of 77916937 in words is "seventy-seven million, nine hundred sixteen thousand, nine hundred thirty-seven".