77981113 has 8 divisors (see below), whose sum is σ = 90040832. Its totient is φ = 66151296.

The previous prime is 77981077. The next prime is 77981117. The reversal of 77981113 is 31118977.

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

It is a cyclic number.

It is not a de Polignac number, because 77981113 - 2⁹ = 77980601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77981117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56745 + ... + 58102.

It is an arithmetic number, because the mean of its divisors is an integer number (11255104).

Almost surely, 2^77981113 is an apocalyptic number.

It is an amenable number.

77981113 is a deficient number, since it is larger than the sum of its proper divisors (12059719).

77981113 is a wasteful number, since it uses less digits than its factorization.

77981113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114951.

The product of its digits is 10584, while the sum is 37.

The square root of 77981113 is about 8830.6915357745. The cubic root of 77981113 is about 427.2313791874.

It can be divided in two parts, 7798 and 1113, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 77981113 in words is "seventy-seven million, nine hundred eighty-one thousand, one hundred thirteen".