473191891 has 2 divisors, whose sum is σ = 473191892. Its totient is φ = 473191890.

The previous prime is 473191847. The next prime is 473191919. The reversal of 473191891 is 198191374.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-473191891 is a prime.

It is not a weakly prime, because it can be changed into another prime (473191801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236595945 + 236595946.

It is an arithmetic number, because the mean of its divisors is an integer number (236595946).

Almost surely, 2^473191891 is an apocalyptic number.

473191891 is a deficient number, since it is larger than the sum of its proper divisors (1).

473191891 is an equidigital number, since it uses as much as digits as its factorization.

473191891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 43.

The square root of 473191891 is about 21752.9743023799. The cubic root of 473191891 is about 779.2541034016.

The spelling of 473191891 in words is "four hundred seventy-three million, one hundred ninety-one thousand, eight hundred ninety-one".