31443158939 has 2 divisors, whose sum is σ = 31443158940. Its totient is φ = 31443158938.

The previous prime is 31443158863. The next prime is 31443158947. The reversal of 31443158939 is 93985134413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31443158939 - 2⁸ = 31443158683 is a prime.

It is not a weakly prime, because it can be changed into another prime (31443157939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721579469 + 15721579470.

It is an arithmetic number, because the mean of its divisors is an integer number (15721579470).

Almost surely, 2^31443158939 is an apocalyptic number.

31443158939 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443158939 is an equidigital number, since it uses as much as digits as its factorization.

31443158939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The spelling of 31443158939 in words is "thirty-one billion, four hundred forty-three million, one hundred fifty-eight thousand, nine hundred thirty-nine".