31872717323 has 2 divisors, whose sum is σ = 31872717324. Its totient is φ = 31872717322.

The previous prime is 31872717277. The next prime is 31872717347. The reversal of 31872717323 is 32371727813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31872717323 - 2⁶ = 31872717259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31872717523) 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 as a sum of consecutive naturals, namely, 15936358661 + 15936358662.

It is an arithmetic number, because the mean of its divisors is an integer number (15936358662).

Almost surely, 2^31872717323 is an apocalyptic number.

31872717323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31872717323 is an equidigital number, since it uses as much as digits as its factorization.

31872717323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 44.

The spelling of 31872717323 in words is "thirty-one billion, eight hundred seventy-two million, seven hundred seventeen thousand, three hundred twenty-three".