631263863 has 2 divisors, whose sum is σ = 631263864. Its totient is φ = 631263862.

The previous prime is 631263823. The next prime is 631263869. The reversal of 631263863 is 368362136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631263863 - 2¹⁶ = 631198327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631263869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315631931 + 315631932.

It is an arithmetic number, because the mean of its divisors is an integer number (315631932).

Almost surely, 2^631263863 is an apocalyptic number.

631263863 is a deficient number, since it is larger than the sum of its proper divisors (1).

631263863 is an equidigital number, since it uses as much as digits as its factorization.

631263863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The square root of 631263863 is about 25124.9649352989. The cubic root of 631263863 is about 857.8347654091.

The spelling of 631263863 in words is "six hundred thirty-one million, two hundred sixty-three thousand, eight hundred sixty-three".