631072969 has 4 divisors (see below), whose sum is σ = 631151044. Its totient is φ = 630994896.

The previous prime is 631072957. The next prime is 631072991. The reversal of 631072969 is 969270136.

631072969 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.

It can be written as a sum of positive squares in 2 ways, for example, as 145443600 + 485629369 = 12060^2 + 22037^2 .

It is a cyclic number.

It is not a de Polignac number, because 631072969 - 2²¹ = 628975817 is a prime.

It is a super-2 number, since 2×631072969² = 796506184404949922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631072469) 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, 25302 + ... + 43615.

It is an arithmetic number, because the mean of its divisors is an integer number (157787761).

Almost surely, 2^631072969 is an apocalyptic number.

It is an amenable number.

631072969 is a deficient number, since it is larger than the sum of its proper divisors (78075).

631072969 is an equidigital number, since it uses as much as digits as its factorization.

631072969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78074.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 631072969 is about 25121.1657571857. The cubic root of 631072969 is about 857.7482870342.

The spelling of 631072969 in words is "six hundred thirty-one million, seventy-two thousand, nine hundred sixty-nine".