791382491 has 4 divisors (see below), whose sum is σ = 791447184. Its totient is φ = 791317800.

The previous prime is 791382481. The next prime is 791382497. The reversal of 791382491 is 194283197.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791382491 is a prime.

It is a super-2 number, since 2×791382491² = 1252572494122730162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791382497) 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, 7775 + ... + 40536.

It is an arithmetic number, because the mean of its divisors is an integer number (197861796).

Almost surely, 2^791382491 is an apocalyptic number.

791382491 is a deficient number, since it is larger than the sum of its proper divisors (64693).

791382491 is a wasteful number, since it uses less digits than its factorization.

791382491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64692.

The product of its digits is 108864, while the sum is 44.

The square root of 791382491 is about 28131.5213061789. The cubic root of 791382491 is about 924.9724816747.

The spelling of 791382491 in words is "seven hundred ninety-one million, three hundred eighty-two thousand, four hundred ninety-one".