631086589 has 4 divisors (see below), whose sum is σ = 721241824. Its totient is φ = 540931356.

The previous prime is 631086587. The next prime is 631086667. The reversal of 631086589 is 985680136.

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 631086589 - 2¹ = 631086587 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 (631086587) 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, 45077607 + ... + 45077620.

It is an arithmetic number, because the mean of its divisors is an integer number (180310456).

Almost surely, 2^631086589 is an apocalyptic number.

It is an amenable number.

631086589 is a deficient number, since it is larger than the sum of its proper divisors (90155235).

631086589 is an equidigital number, since it uses as much as digits as its factorization.

631086589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90155234.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 631086589 is about 25121.4368418687. The cubic root of 631086589 is about 857.7544577140.

The spelling of 631086589 in words is "six hundred thirty-one million, eighty-six thousand, five hundred eighty-nine".