631930978969783 has 2 divisors, whose sum is σ = 631930978969784. Its totient is φ = 631930978969782.

The previous prime is 631930978969729. The next prime is 631930978969907. The reversal of 631930978969783 is 387969879039136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631930978969783 - 2¹⁷ = 631930978838711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631930978969694 and 631930978969703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631930978964783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315965489484891 + 315965489484892.

It is an arithmetic number, because the mean of its divisors is an integer number (315965489484892).

Almost surely, 2^{631930978969783} is an apocalyptic number.

631930978969783 is a deficient number, since it is larger than the sum of its proper divisors (1).

631930978969783 is an equidigital number, since it uses as much as digits as its factorization.

631930978969783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19999187712, while the sum is 88.

The spelling of 631930978969783 in words is "six hundred thirty-one trillion, nine hundred thirty billion, nine hundred seventy-eight million, nine hundred sixty-nine thousand, seven hundred eighty-three".