7940740013 has 2 divisors, whose sum is σ = 7940740014. Its totient is φ = 7940740012.

The previous prime is 7940740007. The next prime is 7940740051. The reversal of 7940740013 is 3100470497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4775777449 + 3164962564 = 69107^2 + 56258^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940740013 - 2⁸ = 7940739757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7940745013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970370006 + 3970370007.

It is an arithmetic number, because the mean of its divisors is an integer number (3970370007).

Almost surely, 2^7940740013 is an apocalyptic number.

It is an amenable number.

7940740013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940740013 is an equidigital number, since it uses as much as digits as its factorization.

7940740013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 7940740013 is about 89110.8299422691. The cubic root of 7940740013 is about 1995.0494237582.

The spelling of 7940740013 in words is "seven billion, nine hundred forty million, seven hundred forty thousand, thirteen".