791855171 has 2 divisors, whose sum is σ = 791855172. Its totient is φ = 791855170.

The previous prime is 791855149. The next prime is 791855177. The reversal of 791855171 is 171558197.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791855171 is a prime.

It is a super-2 number, since 2×791855171² = 1254069223678878482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (791855177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395927585 + 395927586.

It is an arithmetic number, because the mean of its divisors is an integer number (395927586).

Almost surely, 2^791855171 is an apocalyptic number.

791855171 is a deficient number, since it is larger than the sum of its proper divisors (1).

791855171 is an equidigital number, since it uses as much as digits as its factorization.

791855171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 44.

The square root of 791855171 is about 28139.9213040833. The cubic root of 791855171 is about 925.1566020712.

The spelling of 791855171 in words is "seven hundred ninety-one million, eight hundred fifty-five thousand, one hundred seventy-one".