479843891 has 2 divisors, whose sum is σ = 479843892. Its totient is φ = 479843890.

The previous prime is 479843863. The next prime is 479843911. The reversal of 479843891 is 198348974.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-479843891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (479840891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239921945 + 239921946.

It is an arithmetic number, because the mean of its divisors is an integer number (239921946).

Almost surely, 2^479843891 is an apocalyptic number.

479843891 is a deficient number, since it is larger than the sum of its proper divisors (1).

479843891 is an equidigital number, since it uses as much as digits as its factorization.

479843891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 479843891 is about 21905.3393262921. The cubic root of 479843891 is about 782.8886376312. Note that the first 3 decimals are identical.

The spelling of 479843891 in words is "four hundred seventy-nine million, eight hundred forty-three thousand, eight hundred ninety-one".