631628707 has 2 divisors, whose sum is σ = 631628708. Its totient is φ = 631628706.

The previous prime is 631628681. The next prime is 631628717. The reversal of 631628707 is 707826136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631628707 - 2⁷ = 631628579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631628707.

It is not a weakly prime, because it can be changed into another prime (631628717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315814353 + 315814354.

It is an arithmetic number, because the mean of its divisors is an integer number (315814354).

Almost surely, 2^631628707 is an apocalyptic number.

631628707 is a deficient number, since it is larger than the sum of its proper divisors (1).

631628707 is an equidigital number, since it uses as much as digits as its factorization.

631628707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 631628707 is about 25132.2244737707. The cubic root of 631628707 is about 857.9999977360. Note that the first 5 decimals are identical.

The spelling of 631628707 in words is "six hundred thirty-one million, six hundred twenty-eight thousand, seven hundred seven".