631922732509 has 2 divisors, whose sum is σ = 631922732510. Its totient is φ = 631922732508.

The previous prime is 631922732473. The next prime is 631922732521. The reversal of 631922732509 is 905237229136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578459119225 + 53463613284 = 760565^2 + 231222^2 .

It is a cyclic number.

It is not a de Polignac number, because 631922732509 - 2⁷ = 631922732381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631922738509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315961366254 + 315961366255.

It is an arithmetic number, because the mean of its divisors is an integer number (315961366255).

Almost surely, 2^631922732509 is an apocalyptic number.

It is an amenable number.

631922732509 is a deficient number, since it is larger than the sum of its proper divisors (1).

631922732509 is an equidigital number, since it uses as much as digits as its factorization.

631922732509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 631922732509 in words is "six hundred thirty-one billion, nine hundred twenty-two million, seven hundred thirty-two thousand, five hundred nine".