77197994 has 8 divisors (see below), whose sum is σ = 116026020. Its totient is φ = 38522656.

The previous prime is 77197987. The next prime is 77198027. The reversal of 77197994 is 49979177.

It can be written as a sum of positive squares in 2 ways, for example, as 65205625 + 11992369 = 8075^2 + 3463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36899 + ... + 38934.

Almost surely, 2^77197994 is an apocalyptic number.

77197994 is a deficient number, since it is larger than the sum of its proper divisors (38828026).

77197994 is a wasteful number, since it uses less digits than its factorization.

77197994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76344.

The product of its digits is 1000188, while the sum is 53.

The square root of 77197994 is about 8786.2388995520. The cubic root of 77197994 is about 425.7964194378.

The spelling of 77197994 in words is "seventy-seven million, one hundred ninety-seven thousand, nine hundred ninety-four".