791438849 has 4 divisors (see below), whose sum is σ = 791498820. Its totient is φ = 791378880.

The previous prime is 791438833. The next prime is 791438861. The reversal of 791438849 is 948834197.

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 can be written as a sum of positive squares in 2 ways, for example, as 780811249 + 10627600 = 27943^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 791438849 - 2⁴ = 791438833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 791438849.

It is not an unprimeable number, because it can be changed into a prime (791437849) 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, 572 + ... + 39789.

It is an arithmetic number, because the mean of its divisors is an integer number (197874705).

Almost surely, 2^791438849 is an apocalyptic number.

It is an amenable number.

791438849 is a deficient number, since it is larger than the sum of its proper divisors (59971).

791438849 is a wasteful number, since it uses less digits than its factorization.

791438849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59970.

The product of its digits is 1741824, while the sum is 53.

The square root of 791438849 is about 28132.5229760859. The cubic root of 791438849 is about 924.9944383401.

The spelling of 791438849 in words is "seven hundred ninety-one million, four hundred thirty-eight thousand, eight hundred forty-nine".