77967986 has 8 divisors (see below), whose sum is σ = 117628524. Its totient is φ = 38758480.

The previous prime is 77967973. The next prime is 77967997. The reversal of 77967986 is 68976977.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 1142761 = 8765^2 + 1069^2 .

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

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 112325 + ... + 113016.

Almost surely, 2^77967986 is an apocalyptic number.

77967986 is a deficient number, since it is larger than the sum of its proper divisors (39660538).

77967986 is a wasteful number, since it uses less digits than its factorization.

77967986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225516.

The product of its digits is 8001504, while the sum is 59.

The square root of 77967986 is about 8829.9482444689. The cubic root of 77967986 is about 427.2074050873.

The spelling of 77967986 in words is "seventy-seven million, nine hundred sixty-seven thousand, nine hundred eighty-six".