631445063 has 2 divisors, whose sum is σ = 631445064. Its totient is φ = 631445062.

The previous prime is 631445041. The next prime is 631445083. The reversal of 631445063 is 360544136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631445063 - 2¹⁶ = 631379527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631445033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315722531 + 315722532.

It is an arithmetic number, because the mean of its divisors is an integer number (315722532).

Almost surely, 2^631445063 is an apocalyptic number.

631445063 is a deficient number, since it is larger than the sum of its proper divisors (1).

631445063 is an equidigital number, since it uses as much as digits as its factorization.

631445063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 631445063 is about 25128.5706517502. The cubic root of 631445063 is about 857.9168361027.

Adding to 631445063 its reverse (360544136), we get a palindrome (991989199).

The spelling of 631445063 in words is "six hundred thirty-one million, four hundred forty-five thousand, sixty-three".