31137961429 has 4 divisors (see below), whose sum is σ = 31361975680. Its totient is φ = 30913947180.

The previous prime is 31137961423. The next prime is 31137961451. The reversal of 31137961429 is 92416973113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31137961429 - 2²⁹ = 30601090517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31137961423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112006917 + ... + 112007194.

It is an arithmetic number, because the mean of its divisors is an integer number (7840493920).

Almost surely, 2^31137961429 is an apocalyptic number.

It is an amenable number.

31137961429 is a deficient number, since it is larger than the sum of its proper divisors (224014251).

31137961429 is a wasteful number, since it uses less digits than its factorization.

31137961429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224014250.

The product of its digits is 244944, while the sum is 46.

It can be divided in two parts, 3113796 and 1429, that added together give a square (3115225 = 1765²).

The spelling of 31137961429 in words is "thirty-one billion, one hundred thirty-seven million, nine hundred sixty-one thousand, four hundred twenty-nine".