31930953479 has 2 divisors, whose sum is σ = 31930953480. Its totient is φ = 31930953478.

The previous prime is 31930953473. The next prime is 31930953487. The reversal of 31930953479 is 97435903913.

It is a weak prime.

It is an emirp because it is prime and its reverse (97435903913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31930953479 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31930953479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31930953473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15965476739 + 15965476740.

It is an arithmetic number, because the mean of its divisors is an integer number (15965476740).

Almost surely, 2^31930953479 is an apocalyptic number.

31930953479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31930953479 is an equidigital number, since it uses as much as digits as its factorization.

31930953479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2755620, while the sum is 53.

The spelling of 31930953479 in words is "thirty-one billion, nine hundred thirty million, nine hundred fifty-three thousand, four hundred seventy-nine".