31091406629 has 4 divisors (see below), whose sum is σ = 31094494176. Its totient is φ = 31088319084.

The previous prime is 31091406613. The next prime is 31091406653. The reversal of 31091406629 is 92660419013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92660419013 = 37 ⋅2504335649.

It is a cyclic number.

It is not a de Polignac number, because 31091406629 - 2⁴ = 31091406613 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 (31091406329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528619 + ... + 1548824.

It is an arithmetic number, because the mean of its divisors is an integer number (7773623544).

Almost surely, 2^31091406629 is an apocalyptic number.

It is an amenable number.

31091406629 is a deficient number, since it is larger than the sum of its proper divisors (3087547).

31091406629 is a wasteful number, since it uses less digits than its factorization.

31091406629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087546.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 31091406629 in words is "thirty-one billion, ninety-one million, four hundred six thousand, six hundred twenty-nine".