631493623 has 2 divisors, whose sum is σ = 631493624. Its totient is φ = 631493622.

The previous prime is 631493617. The next prime is 631493641. The reversal of 631493623 is 326394136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631493623 - 2¹⁷ = 631362551 is a prime.

It is a super-2 number, since 2×631493623² = 797568391779332258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631493683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315746811 + 315746812.

It is an arithmetic number, because the mean of its divisors is an integer number (315746812).

Almost surely, 2^631493623 is an apocalyptic number.

631493623 is a deficient number, since it is larger than the sum of its proper divisors (1).

631493623 is an equidigital number, since it uses as much as digits as its factorization.

631493623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 631493623 is about 25129.5368640172. The cubic root of 631493623 is about 857.9388276562.

The spelling of 631493623 in words is "six hundred thirty-one million, four hundred ninety-three thousand, six hundred twenty-three".