631239673 has 2 divisors, whose sum is σ = 631239674. Its totient is φ = 631239672.

The previous prime is 631239667. The next prime is 631239689. The reversal of 631239673 is 376932136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346406544 + 284833129 = 18612^2 + 16877^2 .

It is a cyclic number.

It is not a de Polignac number, because 631239673 - 2¹⁷ = 631108601 is a prime.

It is not a weakly prime, because it can be changed into another prime (631239073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315619836 + 315619837.

It is an arithmetic number, because the mean of its divisors is an integer number (315619837).

Almost surely, 2^631239673 is an apocalyptic number.

It is an amenable number.

631239673 is a deficient number, since it is larger than the sum of its proper divisors (1).

631239673 is an equidigital number, since it uses as much as digits as its factorization.

631239673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 40.

The square root of 631239673 is about 25124.4835369804. The cubic root of 631239673 is about 857.8238078739.

The spelling of 631239673 in words is "six hundred thirty-one million, two hundred thirty-nine thousand, six hundred seventy-three".