39242703931 has 2 divisors, whose sum is σ = 39242703932. Its totient is φ = 39242703930.

The previous prime is 39242703887. The next prime is 39242703991. The reversal of 39242703931 is 13930724293.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39242703931 - 2⁹ = 39242703419 is a prime.

It is a super-2 number, since 2×39242703931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39242703991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19621351965 + 19621351966.

It is an arithmetic number, because the mean of its divisors is an integer number (19621351966).

Almost surely, 2^39242703931 is an apocalyptic number.

39242703931 is a deficient number, since it is larger than the sum of its proper divisors (1).

39242703931 is an equidigital number, since it uses as much as digits as its factorization.

39242703931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 43.

The spelling of 39242703931 in words is "thirty-nine billion, two hundred forty-two million, seven hundred three thousand, nine hundred thirty-one".