104001639 has 16 divisors (see below), whose sum is σ = 159184128. Its totient is φ = 59164992.

The previous prime is 104001617. The next prime is 104001641. The reversal of 104001639 is 936100401.

It is not a de Polignac number, because 104001639 - 2²¹ = 101904487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104001659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6142 + ... + 15675.

It is an arithmetic number, because the mean of its divisors is an integer number (9949008).

Almost surely, 2^104001639 is an apocalyptic number.

104001639 is a deficient number, since it is larger than the sum of its proper divisors (55182489).

104001639 is a wasteful number, since it uses less digits than its factorization.

104001639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22054.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 104001639 is about 10198.1193854553. The cubic root of 104001639 is about 470.2694079399.

The spelling of 104001639 in words is "one hundred four million, one thousand, six hundred thirty-nine".