791264161 has 2 divisors, whose sum is σ = 791264162. Its totient is φ = 791264160.

The previous prime is 791264153. The next prime is 791264183. The reversal of 791264161 is 161462197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396010000 + 395254161 = 19900^2 + 19881^2 .

It is a cyclic number.

It is not a de Polignac number, because 791264161 - 2³ = 791264153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 791264161.

It is not a weakly prime, because it can be changed into another prime (791264191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395632080 + 395632081.

It is an arithmetic number, because the mean of its divisors is an integer number (395632081).

Almost surely, 2^791264161 is an apocalyptic number.

It is an amenable number.

791264161 is a deficient number, since it is larger than the sum of its proper divisors (1).

791264161 is an equidigital number, since it uses as much as digits as its factorization.

791264161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 791264161 is about 28129.4180707671. The cubic root of 791264161 is about 924.9263777781.

The spelling of 791264161 in words is "seven hundred ninety-one million, two hundred sixty-four thousand, one hundred sixty-one".