76981013 has 2 divisors, whose sum is σ = 76981014. Its totient is φ = 76981012.

The previous prime is 76980991. The next prime is 76981019. The reversal of 76981013 is 31018967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71791729 + 5189284 = 8473^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 76981013 - 2⁶ = 76980949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76981019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38490506 + 38490507.

It is an arithmetic number, because the mean of its divisors is an integer number (38490507).

Almost surely, 2^76981013 is an apocalyptic number.

It is an amenable number.

76981013 is a deficient number, since it is larger than the sum of its proper divisors (1).

76981013 is an equidigital number, since it uses as much as digits as its factorization.

76981013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 76981013 is about 8773.8824359573. The cubic root of 76981013 is about 425.3971153294.

The spelling of 76981013 in words is "seventy-six million, nine hundred eighty-one thousand, thirteen".