76983981 has 4 divisors (see below), whose sum is σ = 102645312. Its totient is φ = 51322652.

The previous prime is 76983961. The next prime is 76983997. The reversal of 76983981 is 18938967.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76983981 - 2¹⁸ = 76721837 is a prime.

It is a super-2 number, since 2×76983981² = 11853066661216722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76983901) 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, 12830661 + ... + 12830666.

It is an arithmetic number, because the mean of its divisors is an integer number (25661328).

Almost surely, 2^76983981 is an apocalyptic number.

It is an amenable number.

76983981 is a deficient number, since it is larger than the sum of its proper divisors (25661331).

76983981 is a wasteful number, since it uses less digits than its factorization.

76983981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25661330.

The product of its digits is 653184, while the sum is 51.

The square root of 76983981 is about 8774.0515726772. The cubic root of 76983981 is about 425.4025823156.

The spelling of 76983981 in words is "seventy-six million, nine hundred eighty-three thousand, nine hundred eighty-one".