673680139 has 8 divisors (see below), whose sum is σ = 735341040. Its totient is φ = 612088800.

The previous prime is 673680083. The next prime is 673680173. The reversal of 673680139 is 931086376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 673680139 - 2⁹ = 673679627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673680095 and 673680104.

It is not an unprimeable number, because it can be changed into a prime (673689139) 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 7 ways as a sum of consecutive naturals, for example, 4017 + ... + 36925.

It is an arithmetic number, because the mean of its divisors is an integer number (91917630).

Almost surely, 2^673680139 is an apocalyptic number.

673680139 is a deficient number, since it is larger than the sum of its proper divisors (61660901).

673680139 is a wasteful number, since it uses less digits than its factorization.

673680139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34781.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 673680139 is about 25955.3489477603. The cubic root of 673680139 is about 876.6332007028.

The spelling of 673680139 in words is "six hundred seventy-three million, six hundred eighty thousand, one hundred thirty-nine".