631703729123 has 2 divisors, whose sum is σ = 631703729124. Its totient is φ = 631703729122.

The previous prime is 631703729117. The next prime is 631703729171. The reversal of 631703729123 is 321927307136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631703729123 - 2⁸ = 631703728867 is a prime.

It is not a weakly prime, because it can be changed into another prime (631703729183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315851864561 + 315851864562.

It is an arithmetic number, because the mean of its divisors is an integer number (315851864562).

Almost surely, 2^631703729123 is an apocalyptic number.

631703729123 is a deficient number, since it is larger than the sum of its proper divisors (1).

631703729123 is an equidigital number, since it uses as much as digits as its factorization.

631703729123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 44.

The spelling of 631703729123 in words is "six hundred thirty-one billion, seven hundred three million, seven hundred twenty-nine thousand, one hundred twenty-three".