31494857629 has 2 divisors, whose sum is σ = 31494857630. Its totient is φ = 31494857628.

The previous prime is 31494857627. The next prime is 31494857659. The reversal of 31494857629 is 92675849413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30545601529 + 949256100 = 174773^2 + 30810^2 .

It is a cyclic number.

It is not a de Polignac number, because 31494857629 - 2¹ = 31494857627 is a prime.

Together with 31494857627, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31494857627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15747428814 + 15747428815.

It is an arithmetic number, because the mean of its divisors is an integer number (15747428815).

Almost surely, 2^31494857629 is an apocalyptic number.

It is an amenable number.

31494857629 is a deficient number, since it is larger than the sum of its proper divisors (1).

31494857629 is an equidigital number, since it uses as much as digits as its factorization.

31494857629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 58.

The spelling of 31494857629 in words is "thirty-one billion, four hundred ninety-four million, eight hundred fifty-seven thousand, six hundred twenty-nine".