3113977021 has 2 divisors, whose sum is σ = 3113977022. Its totient is φ = 3113977020.

The previous prime is 3113977007. The next prime is 3113977039. The reversal of 3113977021 is 1207793113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2541571396 + 572405625 = 50414^2 + 23925^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113977021 - 2¹¹ = 3113974973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3113977081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556988510 + 1556988511.

It is an arithmetic number, because the mean of its divisors is an integer number (1556988511).

Almost surely, 2^3113977021 is an apocalyptic number.

It is an amenable number.

3113977021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113977021 is an equidigital number, since it uses as much as digits as its factorization.

3113977021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 3113977021 is about 55803.0198197194. The cubic root of 3113977021 is about 1460.2878366944.

The spelling of 3113977021 in words is "three billion, one hundred thirteen million, nine hundred seventy-seven thousand, twenty-one".