31290660313 has 4 divisors (see below), whose sum is σ = 34135265808. Its totient is φ = 28446054820.

The previous prime is 31290660307. The next prime is 31290660353. The reversal of 31290660313 is 31306609213.

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 31290660313 - 2²¹ = 31288563161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31290660353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1422302731 + ... + 1422302752.

It is an arithmetic number, because the mean of its divisors is an integer number (8533816452).

Almost surely, 2^31290660313 is an apocalyptic number.

It is an amenable number.

31290660313 is a deficient number, since it is larger than the sum of its proper divisors (2844605495).

31290660313 is a wasteful number, since it uses less digits than its factorization.

31290660313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844605494.

The product of its (nonzero) digits is 17496, while the sum is 34.

The spelling of 31290660313 in words is "thirty-one billion, two hundred ninety million, six hundred sixty thousand, three hundred thirteen".