631628927 has 4 divisors (see below), whose sum is σ = 636173160. Its totient is φ = 627084696.

The previous prime is 631628917. The next prime is 631628941. The reversal of 631628927 is 729826136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631628927 - 2¹² = 631624831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631628917) 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, 2271908 + ... + 2272185.

It is an arithmetic number, because the mean of its divisors is an integer number (159043290).

Almost surely, 2^631628927 is an apocalyptic number.

631628927 is a deficient number, since it is larger than the sum of its proper divisors (4544233).

631628927 is a wasteful number, since it uses less digits than its factorization.

631628927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544232.

The product of its digits is 217728, while the sum is 44.

The square root of 631628927 is about 25132.2288506213. The cubic root of 631628927 is about 858.0000973515. Note that the first 4 decimals are identical.

The spelling of 631628927 in words is "six hundred thirty-one million, six hundred twenty-eight thousand, nine hundred twenty-seven".