631628713 has 4 divisors (see below), whose sum is σ = 632364880. Its totient is φ = 630892548.

The previous prime is 631628707. The next prime is 631628717. The reversal of 631628713 is 317826136.

It is a Cunningham number, because it is equal to 858³+1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631628713 - 2⁵ = 631628681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631628717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366795 + ... + 368512.

It is an arithmetic number, because the mean of its divisors is an integer number (158091220).

Almost surely, 2^631628713 is an apocalyptic number.

It is an amenable number.

631628713 is a deficient number, since it is larger than the sum of its proper divisors (736167).

631628713 is an equidigital number, since it uses as much as digits as its factorization.

631628713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736166.

The product of its digits is 36288, while the sum is 37.

The square root of 631628713 is about 25132.2245931394. The cubic root of 631628713 is about 858.0000004528. Note that the first 6 decimals are identical.

The spelling of 631628713 in words is "six hundred thirty-one million, six hundred twenty-eight thousand, seven hundred thirteen".