631327001 has 2 divisors, whose sum is σ = 631327002. Its totient is φ = 631327000.

The previous prime is 631326919. The next prime is 631327009. The reversal of 631327001 is 100723136.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393427225 + 237899776 = 19835^2 + 15424^2 .

It is a cyclic number.

It is not a de Polignac number, because 631327001 - 2¹⁸ = 631064857 is a prime.

It is not a weakly prime, because it can be changed into another prime (631327009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315663500 + 315663501.

It is an arithmetic number, because the mean of its divisors is an integer number (315663501).

Almost surely, 2^631327001 is an apocalyptic number.

It is an amenable number.

631327001 is a deficient number, since it is larger than the sum of its proper divisors (1).

631327001 is an equidigital number, since it uses as much as digits as its factorization.

631327001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 631327001 is about 25126.2213832482. The cubic root of 631327001 is about 857.8633642086.

The spelling of 631327001 in words is "six hundred thirty-one million, three hundred twenty-seven thousand, one".