77684986 has 8 divisors (see below), whose sum is σ = 116568864. Its totient is φ = 38828700.

The previous prime is 77684953. The next prime is 77684987. The reversal of 77684986 is 68948677.

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

It is not an unprimeable number, because it can be changed into a prime (77684987) 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, 2961 + ... + 12811.

It is an arithmetic number, because the mean of its divisors is an integer number (14571108).

Almost surely, 2^77684986 is an apocalyptic number.

77684986 is a deficient number, since it is larger than the sum of its proper divisors (38883878).

77684986 is a wasteful number, since it uses less digits than its factorization.

77684986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13796.

The product of its digits is 4064256, while the sum is 55.

The square root of 77684986 is about 8813.9086675549. The cubic root of 77684986 is about 426.6899009429.

The spelling of 77684986 in words is "seventy-seven million, six hundred eighty-four thousand, nine hundred eighty-six".