631923101 has 2 divisors, whose sum is σ = 631923102. Its totient is φ = 631923100.

The previous prime is 631923041. The next prime is 631923139. The reversal of 631923101 is 101329136.

631923101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431559076 + 200364025 = 20774^2 + 14155^2 .

It is a cyclic number.

It is not a de Polignac number, because 631923101 - 2²² = 627728797 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 (631925101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315961550 + 315961551.

It is an arithmetic number, because the mean of its divisors is an integer number (315961551).

Almost surely, 2^631923101 is an apocalyptic number.

It is an amenable number.

631923101 is a deficient number, since it is larger than the sum of its proper divisors (1).

631923101 is an equidigital number, since it uses as much as digits as its factorization.

631923101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 631923101 is about 25138.0806944365. The cubic root of 631923101 is about 858.1332779452.

The spelling of 631923101 in words is "six hundred thirty-one million, nine hundred twenty-three thousand, one hundred one".