31604503373 has 2 divisors, whose sum is σ = 31604503374. Its totient is φ = 31604503372.

The previous prime is 31604503351. The next prime is 31604503409. The reversal of 31604503373 is 37330540613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24315100489 + 7289402884 = 155933^2 + 85378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31604503373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31604503303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15802251686 + 15802251687.

It is an arithmetic number, because the mean of its divisors is an integer number (15802251687).

Almost surely, 2^31604503373 is an apocalyptic number.

It is an amenable number.

31604503373 is a deficient number, since it is larger than the sum of its proper divisors (1).

31604503373 is an equidigital number, since it uses as much as digits as its factorization.

31604503373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 35.

The spelling of 31604503373 in words is "thirty-one billion, six hundred four million, five hundred three thousand, three hundred seventy-three".