631197812097 has 12 divisors (see below), whose sum is σ = 911738485840. Its totient is φ = 420794704728.

The previous prime is 631197812081. The next prime is 631197812131. The reversal of 631197812097 is 790218791136.

It is a happy number.

It is not a de Polignac number, because 631197812097 - 2⁴ = 631197812081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631197812027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015854 + ... + 1514712.

Almost surely, 2^631197812097 is an apocalyptic number.

It is an amenable number.

631197812097 is a deficient number, since it is larger than the sum of its proper divisors (280540673743).

631197812097 is a wasteful number, since it uses less digits than its factorization.

631197812097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639452 (or 639449 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 631197812097 in words is "six hundred thirty-one billion, one hundred ninety-seven million, eight hundred twelve thousand, ninety-seven".