791148721 has 8 divisors (see below), whose sum is σ = 863871264. Its totient is φ = 718559520.

The previous prime is 791148713. The next prime is 791148731. The reversal of 791148721 is 127841197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 791148721 - 2³ = 791148713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791148731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20715 + ... + 44848.

It is an arithmetic number, because the mean of its divisors is an integer number (107983908).

Almost surely, 2^791148721 is an apocalyptic number.

It is an amenable number.

791148721 is a deficient number, since it is larger than the sum of its proper divisors (72722543).

791148721 is a wasteful number, since it uses less digits than its factorization.

791148721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66671.

The product of its digits is 28224, while the sum is 40.

The square root of 791148721 is about 28127.3660515876. The cubic root of 791148721 is about 924.8813954578.

The spelling of 791148721 in words is "seven hundred ninety-one million, one hundred forty-eight thousand, seven hundred twenty-one".