631976329 has 2 divisors, whose sum is σ = 631976330. Its totient is φ = 631976328.

The previous prime is 631976311. The next prime is 631976353. The reversal of 631976329 is 923679136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411156729 + 220819600 = 20277^2 + 14860^2 .

It is a cyclic number.

It is not a de Polignac number, because 631976329 - 2⁵ = 631976297 is a prime.

It is not a weakly prime, because it can be changed into another prime (631976369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315988164 + 315988165.

It is an arithmetic number, because the mean of its divisors is an integer number (315988165).

Almost surely, 2^631976329 is an apocalyptic number.

It is an amenable number.

631976329 is a deficient number, since it is larger than the sum of its proper divisors (1).

631976329 is an equidigital number, since it uses as much as digits as its factorization.

631976329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 46.

The square root of 631976329 is about 25139.1393846329. The cubic root of 631976329 is about 858.1573712964.

The spelling of 631976329 in words is "six hundred thirty-one million, nine hundred seventy-six thousand, three hundred twenty-nine".