31538995429 has 2 divisors, whose sum is σ = 31538995430. Its totient is φ = 31538995428.

The previous prime is 31538995427. The next prime is 31538995483. The reversal of 31538995429 is 92459983513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19372464225 + 12166531204 = 139185^2 + 110302^2 .

It is an emirp because it is prime and its reverse (92459983513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31538995429 - 2¹ = 31538995427 is a prime.

Together with 31538995427, 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 (31538995421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15769497714 + 15769497715.

It is an arithmetic number, because the mean of its divisors is an integer number (15769497715).

Almost surely, 2^31538995429 is an apocalyptic number.

It is an amenable number.

31538995429 is a deficient number, since it is larger than the sum of its proper divisors (1).

31538995429 is an equidigital number, since it uses as much as digits as its factorization.

31538995429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 58.

The spelling of 31538995429 in words is "thirty-one billion, five hundred thirty-eight million, nine hundred ninety-five thousand, four hundred twenty-nine".