631359289 has 4 divisors (see below), whose sum is σ = 688755600. Its totient is φ = 573962980.

The previous prime is 631359259. The next prime is 631359293. The reversal of 631359289 is 982953136.

It is a happy number.

631359289 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 a cyclic number.

It is not a de Polignac number, because 631359289 - 2⁵ = 631359257 is a prime.

It is a super-2 number, since 2×631359289² = 797229103613171042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631359229) 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, 28698139 + ... + 28698160.

It is an arithmetic number, because the mean of its divisors is an integer number (172188900).

Almost surely, 2^631359289 is an apocalyptic number.

It is an amenable number.

631359289 is a deficient number, since it is larger than the sum of its proper divisors (57396311).

631359289 is a wasteful number, since it uses less digits than its factorization.

631359289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57396310.

The product of its digits is 349920, while the sum is 46.

The square root of 631359289 is about 25126.8638910629. The cubic root of 631359289 is about 857.8779885475.

It can be divided in two parts, 6313592 and 89, that added together give a triangular number (6313681 = T₃₅₅₃).

The spelling of 631359289 in words is "six hundred thirty-one million, three hundred fifty-nine thousand, two hundred eighty-nine".