77972694 has 32 divisors (see below), whose sum is σ = 165058560. Its totient is φ = 24487200.

The previous prime is 77972683. The next prime is 77972747. The reversal of 77972694 is 49627977.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19984 + ... + 23564.

It is an arithmetic number, because the mean of its divisors is an integer number (5158080).

Almost surely, 2^77972694 is an apocalyptic number.

77972694 is an abundant number, since it is smaller than the sum of its proper divisors (87085866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77972694 is a wasteful number, since it uses less digits than its factorization.

77972694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796.

The product of its digits is 1333584, while the sum is 51.

The square root of 77972694 is about 8830.2148331737. The cubic root of 77972694 is about 427.2160037104.

The spelling of 77972694 in words is "seventy-seven million, nine hundred seventy-two thousand, six hundred ninety-four".