104031591 has 4 divisors (see below), whose sum is σ = 138708792. Its totient is φ = 69354392.

The previous prime is 104031581. The next prime is 104031611. The reversal of 104031591 is 195130401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195130401 = 3 ⋅65043467.

It is a cyclic number.

It is not a de Polignac number, because 104031591 - 2⁵ = 104031559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104031511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17338596 + ... + 17338601.

It is an arithmetic number, because the mean of its divisors is an integer number (34677198).

Almost surely, 2^104031591 is an apocalyptic number.

104031591 is a deficient number, since it is larger than the sum of its proper divisors (34677201).

104031591 is an equidigital number, since it uses as much as digits as its factorization.

104031591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34677200.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 104031591 is about 10199.5877857882. The cubic root of 104031591 is about 470.3145487584.

Adding to 104031591 its reverse (195130401), we get a palindrome (299161992).

The spelling of 104031591 in words is "one hundred four million, thirty-one thousand, five hundred ninety-one".