791155121 has 4 divisors (see below), whose sum is σ = 791247600. Its totient is φ = 791062644.

The previous prime is 791155097. The next prime is 791155139. The reversal of 791155121 is 121551197.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791155121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791155181) 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 in 3 ways as a sum of consecutive naturals, for example, 31931 + ... + 51008.

It is an arithmetic number, because the mean of its divisors is an integer number (197811900).

Almost surely, 2^791155121 is an apocalyptic number.

It is an amenable number.

791155121 is a deficient number, since it is larger than the sum of its proper divisors (92479).

791155121 is an equidigital number, since it uses as much as digits as its factorization.

791155121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92478.

The product of its digits is 3150, while the sum is 32.

The square root of 791155121 is about 28127.4798195644. The cubic root of 791155121 is about 924.8838893947.

The spelling of 791155121 in words is "seven hundred ninety-one million, one hundred fifty-five thousand, one hundred twenty-one".