631953372949 has 2 divisors, whose sum is σ = 631953372950. Its totient is φ = 631953372948.

The previous prime is 631953372937. The next prime is 631953372971. The reversal of 631953372949 is 949273359136.

631953372949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624210604900 + 7742768049 = 790070^2 + 87993^2 .

It is a cyclic number.

It is not a de Polignac number, because 631953372949 - 2⁵ = 631953372917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631953372749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315976686474 + 315976686475.

It is an arithmetic number, because the mean of its divisors is an integer number (315976686475).

Almost surely, 2^631953372949 is an apocalyptic number.

It is an amenable number.

631953372949 is a deficient number, since it is larger than the sum of its proper divisors (1).

631953372949 is an equidigital number, since it uses as much as digits as its factorization.

631953372949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33067440, while the sum is 61.

The spelling of 631953372949 in words is "six hundred thirty-one billion, nine hundred fifty-three million, three hundred seventy-two thousand, nine hundred forty-nine".