104691 has 4 divisors (see below), whose sum is σ = 139592. Its totient is φ = 69792.

The previous prime is 104683. The next prime is 104693. The reversal of 104691 is 196401.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 104691 - 2³ = 104683 is a prime.

It is a D-number.

It is a Duffinian number.

104691 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 104691.

It is not an unprimeable number, because it can be changed into a prime (104693) 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, 17446 + ... + 17451.

It is an arithmetic number, because the mean of its divisors is an integer number (34898).

2¹⁰⁴⁶⁹¹ is an apocalyptic number.

104691 is a deficient number, since it is larger than the sum of its proper divisors (34901).

104691 is an equidigital number, since it uses as much as digits as its factorization.

104691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34900.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 104691 is about 323.5598862653. The cubic root of 104691 is about 47.1306160005.

The spelling of 104691 in words is "one hundred four thousand, six hundred ninety-one".