791742815 has 4 divisors (see below), whose sum is σ = 950091384. Its totient is φ = 633394248.

The previous prime is 791742811. The next prime is 791742829. The reversal of 791742815 is 518247197.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 791742815 - 2² = 791742811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791742811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79174277 + ... + 79174286.

It is an arithmetic number, because the mean of its divisors is an integer number (237522846).

Almost surely, 2^791742815 is an apocalyptic number.

791742815 is a deficient number, since it is larger than the sum of its proper divisors (158348569).

791742815 is a wasteful number, since it uses less digits than its factorization.

791742815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158348568.

The product of its digits is 141120, while the sum is 44.

The square root of 791742815 is about 28137.9248524123. The cubic root of 791742815 is about 925.1128433067.

The spelling of 791742815 in words is "seven hundred ninety-one million, seven hundred forty-two thousand, eight hundred fifteen".