104491591 has 8 divisors (see below), whose sum is σ = 107208464. Its totient is φ = 101787840.

The previous prime is 104491579. The next prime is 104491609. The reversal of 104491591 is 195194401.

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 104491591 - 2⁵ = 104491559 is a prime.

It is a super-2 number, since 2×104491591² = 21836985179422562, 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 (104491501) 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, 14011 + ... + 20131.

It is an arithmetic number, because the mean of its divisors is an integer number (13401058).

Almost surely, 2^104491591 is an apocalyptic number.

104491591 is a deficient number, since it is larger than the sum of its proper divisors (2716873).

104491591 is an equidigital number, since it uses as much as digits as its factorization.

104491591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 104491591 is about 10222.1128442216. The cubic root of 104491591 is about 471.0067314518.

The spelling of 104491591 in words is "one hundred four million, four hundred ninety-one thousand, five hundred ninety-one".