631345673 has 4 divisors (see below), whose sum is σ = 721537920. Its totient is φ = 541153428.

The previous prime is 631345667. The next prime is 631345679. The reversal of 631345673 is 376543136.

It is a happy number.

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 (631345667) and next prime (631345679).

It is a cyclic number.

It is not a de Polignac number, because 631345673 - 2²⁰ = 630297097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631345679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45096113 + ... + 45096126.

It is an arithmetic number, because the mean of its divisors is an integer number (180384480).

Almost surely, 2^631345673 is an apocalyptic number.

It is an amenable number.

631345673 is a deficient number, since it is larger than the sum of its proper divisors (90192247).

631345673 is an equidigital number, since it uses as much as digits as its factorization.

631345673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90192246.

The product of its digits is 136080, while the sum is 38.

The square root of 631345673 is about 25126.5929445279. The cubic root of 631345673 is about 857.8718214564.

The spelling of 631345673 in words is "six hundred thirty-one million, three hundred forty-five thousand, six hundred seventy-three".