631930978969907 has 2 divisors, whose sum is σ = 631930978969908. Its totient is φ = 631930978969906.

The previous prime is 631930978969783. The next prime is 631930978969921. The reversal of 631930978969907 is 709969879039136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631930978969907 - 2³² = 631926684002611 is a prime.

It is a super-4 number, since 4×631930978969907⁴ (a number of 60 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (631930971969907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315965489484953 + 315965489484954.

It is an arithmetic number, because the mean of its divisors is an integer number (315965489484954).

Almost surely, 2^{631930978969907} is an apocalyptic number.

631930978969907 is a deficient number, since it is larger than the sum of its proper divisors (1).

631930978969907 is an equidigital number, since it uses as much as digits as its factorization.

631930978969907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7499695392, while the sum is 86.

The spelling of 631930978969907 in words is "six hundred thirty-one trillion, nine hundred thirty billion, nine hundred seventy-eight million, nine hundred sixty-nine thousand, nine hundred seven".