673399631 has 4 divisors (see below), whose sum is σ = 713011392. Its totient is φ = 633787872.

The previous prime is 673399607. The next prime is 673399673. The reversal of 673399631 is 136993376.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 673399631 - 2¹⁴ = 673383247 is a prime.

It is a super-2 number, since 2×673399631² = 906934126061872322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673399031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19805855 + ... + 19805888.

It is an arithmetic number, because the mean of its divisors is an integer number (178252848).

Almost surely, 2^673399631 is an apocalyptic number.

673399631 is a deficient number, since it is larger than the sum of its proper divisors (39611761).

673399631 is a wasteful number, since it uses less digits than its factorization.

673399631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39611760.

The product of its digits is 551124, while the sum is 47.

The square root of 673399631 is about 25949.9447205577. The cubic root of 673399631 is about 876.5115125063.

The spelling of 673399631 in words is "six hundred seventy-three million, three hundred ninety-nine thousand, six hundred thirty-one".