631346563 has 2 divisors, whose sum is σ = 631346564. Its totient is φ = 631346562.

The previous prime is 631346557. The next prime is 631346579. The reversal of 631346563 is 365643136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631346563 - 2⁵ = 631346531 is a prime.

It is a super-2 number, since 2×631346563² = 797196965223825938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (631346543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315673281 + 315673282.

It is an arithmetic number, because the mean of its divisors is an integer number (315673282).

Almost surely, 2^631346563 is an apocalyptic number.

631346563 is a deficient number, since it is larger than the sum of its proper divisors (1).

631346563 is an equidigital number, since it uses as much as digits as its factorization.

631346563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 37.

The square root of 631346563 is about 25126.6106548416. The cubic root of 631346563 is about 857.8722245666.

Adding to 631346563 its reverse (365643136), we get a palindrome (996989699).

The spelling of 631346563 in words is "six hundred thirty-one million, three hundred forty-six thousand, five hundred sixty-three".