791240641 has 9 divisors (see below), whose sum is σ = 827815009. Its totient is φ = 756220036.

The previous prime is 791240633. The next prime is 791240663. The reversal of 791240641 is 146042197.

The square root of 791240641 is 28129.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 791240641 - 2³ = 791240633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 791240597 and 791240606.

It is not an unprimeable number, because it can be changed into a prime (791240041) 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 in 8 ways as a sum of consecutive naturals, for example, 646356 + ... + 647578.

Almost surely, 2^791240641 is an apocalyptic number.

791240641 is the 28129-th square number.

791240641 is the 14065-th centered octagonal number.

It is an amenable number.

791240641 is a deficient number, since it is larger than the sum of its proper divisors (36574368).

791240641 is an frugal number, since it uses more digits than its factorization.

791240641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The cubic root of 791240641 is about 924.9172133360.

The spelling of 791240641 in words is "seven hundred ninety-one million, two hundred forty thousand, six hundred forty-one".