31347387687 has 32 divisors (see below), whose sum is σ = 53906849280. Its totient is φ = 15722824320.

The previous prime is 31347387679. The next prime is 31347387737. The reversal of 31347387687 is 78678374313.

It is not a de Polignac number, because 31347387687 - 2³ = 31347387679 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31347387587) 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 31 ways as a sum of consecutive naturals, for example, 2333008 + ... + 2346405.

It is an arithmetic number, because the mean of its divisors is an integer number (1684589040).

Almost surely, 2^31347387687 is an apocalyptic number.

31347387687 is a deficient number, since it is larger than the sum of its proper divisors (22559461593).

31347387687 is a wasteful number, since it uses less digits than its factorization.

31347387687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679463.

The product of its digits is 14224896, while the sum is 57.

The spelling of 31347387687 in words is "thirty-one billion, three hundred forty-seven million, three hundred eighty-seven thousand, six hundred eighty-seven".