104219891 has 2 divisors, whose sum is σ = 104219892. Its totient is φ = 104219890.

The previous prime is 104219851. The next prime is 104219933. The reversal of 104219891 is 198912401.

It is a weak prime.

It is an emirp because it is prime and its reverse (198912401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104219891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104219851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52109945 + 52109946.

It is an arithmetic number, because the mean of its divisors is an integer number (52109946).

Almost surely, 2^104219891 is an apocalyptic number.

104219891 is a deficient number, since it is larger than the sum of its proper divisors (1).

104219891 is an equidigital number, since it uses as much as digits as its factorization.

104219891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 104219891 is about 10208.8143777816. The cubic root of 104219891 is about 470.5981384200.

The spelling of 104219891 in words is "one hundred four million, two hundred nineteen thousand, eight hundred ninety-one".