104791991 has 2 divisors, whose sum is σ = 104791992. Its totient is φ = 104791990.

The previous prime is 104791969. The next prime is 104792021. The reversal of 104791991 is 199197401.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104791991 is a prime.

It is a super-2 number, since 2×104791991² = 21962722755488162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104791901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52395995 + 52395996.

It is an arithmetic number, because the mean of its divisors is an integer number (52395996).

Almost surely, 2^104791991 is an apocalyptic number.

104791991 is a deficient number, since it is larger than the sum of its proper divisors (1).

104791991 is an equidigital number, since it uses as much as digits as its factorization.

104791991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 41.

The square root of 104791991 is about 10236.7959342755. The cubic root of 104791991 is about 471.4576610368.

The spelling of 104791991 in words is "one hundred four million, seven hundred ninety-one thousand, nine hundred ninety-one".