631969457 has 4 divisors (see below), whose sum is σ = 722250816. Its totient is φ = 541688100.

The previous prime is 631969451. The next prime is 631969463. The reversal of 631969457 is 754969136.

631969457 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 an interprime number because it is at equal distance from previous prime (631969451) and next prime (631969463).

It is a cyclic number.

It is not a de Polignac number, because 631969457 - 2⁸ = 631969201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631969451) 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, 45140669 + ... + 45140682.

It is an arithmetic number, because the mean of its divisors is an integer number (180562704).

Almost surely, 2^631969457 is an apocalyptic number.

It is an amenable number.

631969457 is a deficient number, since it is larger than the sum of its proper divisors (90281359).

631969457 is an equidigital number, since it uses as much as digits as its factorization.

631969457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90281358.

The product of its digits is 1224720, while the sum is 50.

The square root of 631969457 is about 25139.0027049603. The cubic root of 631969457 is about 858.1542608008.

The spelling of 631969457 in words is "six hundred thirty-one million, nine hundred sixty-nine thousand, four hundred fifty-seven".