31343437679 has 4 divisors (see below), whose sum is σ = 31344035976. Its totient is φ = 31342839384.

The previous prime is 31343437661. The next prime is 31343437711. The reversal of 31343437679 is 97673434313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31343437679 - 2²⁸ = 31075002223 is a prime.

It is a super-2 number, since 2×31343437679² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343437079) 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, 212129 + ... + 328154.

It is an arithmetic number, because the mean of its divisors is an integer number (7836008994).

Almost surely, 2^31343437679 is an apocalyptic number.

31343437679 is a deficient number, since it is larger than the sum of its proper divisors (598297).

31343437679 is an equidigital number, since it uses as much as digits as its factorization.

31343437679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598296.

The product of its digits is 3429216, while the sum is 50.

The spelling of 31343437679 in words is "thirty-one billion, three hundred forty-three million, four hundred thirty-seven thousand, six hundred seventy-nine".