631895089 has 4 divisors (see below), whose sum is σ = 722165824. Its totient is φ = 541624356.

The previous prime is 631895039. The next prime is 631895093. The reversal of 631895089 is 980598136.

631895089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 631895089 - 2⁷ = 631894961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631895039) 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, 45135357 + ... + 45135370.

It is an arithmetic number, because the mean of its divisors is an integer number (180541456).

Almost surely, 2^631895089 is an apocalyptic number.

It is an amenable number.

631895089 is a deficient number, since it is larger than the sum of its proper divisors (90270735).

631895089 is an equidigital number, since it uses as much as digits as its factorization.

631895089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90270734.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 631895089 is about 25137.5235255981. The cubic root of 631895089 is about 858.1205979294.

The spelling of 631895089 in words is "six hundred thirty-one million, eight hundred ninety-five thousand, eighty-nine".