31623797 has 2 divisors, whose sum is σ = 31623798. Its totient is φ = 31623796.

The previous prime is 31623731. The next prime is 31623817. The reversal of 31623797 is 79732613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18957316 + 12666481 = 4354^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 31623797 - 2²⁰ = 30575221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31623797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31623707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15811898 + 15811899.

It is an arithmetic number, because the mean of its divisors is an integer number (15811899).

Almost surely, 2^31623797 is an apocalyptic number.

It is an amenable number.

31623797 is a deficient number, since it is larger than the sum of its proper divisors (1).

31623797 is an equidigital number, since it uses as much as digits as its factorization.

31623797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 31623797 is about 5623.5039788374. The cubic root of 31623797 is about 316.2311673080.

The spelling of 31623797 in words is "thirty-one million, six hundred twenty-three thousand, seven hundred ninety-seven".