104668639 has 8 divisors (see below), whose sum is σ = 105528960. Its totient is φ = 103811736.

The previous prime is 104668637. The next prime is 104668709. The reversal of 104668639 is 936866401.

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 104668639 - 2¹ = 104668637 is a prime.

It is a super-2 number, since 2×104668639² = 21911047980224642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104668595 and 104668604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104668637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132604 + ... + 133390.

It is an arithmetic number, because the mean of its divisors is an integer number (13191120).

Almost surely, 2^104668639 is an apocalyptic number.

104668639 is a deficient number, since it is larger than the sum of its proper divisors (860321).

104668639 is an equidigital number, since it uses as much as digits as its factorization.

104668639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 104668639 is about 10230.7692281666. The cubic root of 104668639 is about 471.2726021144.

The spelling of 104668639 in words is "one hundred four million, six hundred sixty-eight thousand, six hundred thirty-nine".