104431291 has 4 divisors (see below), whose sum is σ = 108032400. Its totient is φ = 100830184.

The previous prime is 104431231. The next prime is 104431303. The reversal of 104431291 is 192134401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192134401 = 1933 ⋅99397.

It is a cyclic number.

It is not a de Polignac number, because 104431291 - 2¹¹ = 104429243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104431231) 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, 1800511 + ... + 1800568.

It is an arithmetic number, because the mean of its divisors is an integer number (27008100).

Almost surely, 2^104431291 is an apocalyptic number.

104431291 is a deficient number, since it is larger than the sum of its proper divisors (3601109).

104431291 is an equidigital number, since it uses as much as digits as its factorization.

104431291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601108.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 104431291 is about 10219.1629304948. The cubic root of 104431291 is about 470.9161111740.

Adding to 104431291 its reverse (192134401), we get a palindrome (296565692).

The spelling of 104431291 in words is "one hundred four million, four hundred thirty-one thousand, two hundred ninety-one".