77989196 has 6 divisors (see below), whose sum is σ = 136481100. Its totient is φ = 38994596.

The previous prime is 77989157. The next prime is 77989199. The reversal of 77989196 is 69198977.

It is not an unprimeable number, because it can be changed into a prime (77989199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748646 + ... + 9748653.

It is an arithmetic number, because the mean of its divisors is an integer number (22746850).

Almost surely, 2^77989196 is an apocalyptic number.

It is an amenable number.

77989196 is a deficient number, since it is larger than the sum of its proper divisors (58491904).

77989196 is a wasteful number, since it uses less digits than its factorization.

77989196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19497303 (or 19497301 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 56.

The square root of 77989196 is about 8831.1491890920. The cubic root of 77989196 is about 427.2461399921.

The spelling of 77989196 in words is "seventy-seven million, nine hundred eighty-nine thousand, one hundred ninety-six".