31904334479 has 4 divisors (see below), whose sum is σ = 31904782560. Its totient is φ = 31903886400.

The previous prime is 31904334463. The next prime is 31904334487. The reversal of 31904334479 is 97443340913.

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 31904334479 - 2⁴ = 31904334463 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 (31904334439) 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, 90839 + ... + 268440.

It is an arithmetic number, because the mean of its divisors is an integer number (7976195640).

Almost surely, 2^31904334479 is an apocalyptic number.

31904334479 is a deficient number, since it is larger than the sum of its proper divisors (448081).

31904334479 is an equidigital number, since it uses as much as digits as its factorization.

31904334479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448080.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 31904334479 in words is "thirty-one billion, nine hundred four million, three hundred thirty-four thousand, four hundred seventy-nine".