77031994 has 16 divisors (see below), whose sum is σ = 124598880. Its totient is φ = 35506800.

The previous prime is 77031979. The next prime is 77032027. The reversal of 77031994 is 49913077.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25917 + ... + 28735.

It is an arithmetic number, because the mean of its divisors is an integer number (7787430).

Almost surely, 2^77031994 is an apocalyptic number.

77031994 is a deficient number, since it is larger than the sum of its proper divisors (47566886).

77031994 is a wasteful number, since it uses less digits than its factorization.

77031994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 77031994 is about 8776.7872254032. The cubic root of 77031994 is about 425.4910016172.

The spelling of 77031994 in words is "seventy-seven million, thirty-one thousand, nine hundred ninety-four".