791443997 has 4 divisors (see below), whose sum is σ = 791579580. Its totient is φ = 791308416.

The previous prime is 791443987. The next prime is 791444009. The reversal of 791443997 is 799344197.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 231222436 + 560221561 = 15206^2 + 23669^2 .

It is a cyclic number.

It is not a de Polignac number, because 791443997 - 2¹⁶ = 791378461 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 (791443937) 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 3 ways as a sum of consecutive naturals, for example, 58622 + ... + 70847.

It is an arithmetic number, because the mean of its divisors is an integer number (197894895).

Almost surely, 2^791443997 is an apocalyptic number.

It is an amenable number.

791443997 is a deficient number, since it is larger than the sum of its proper divisors (135583).

791443997 is a wasteful number, since it uses less digits than its factorization.

791443997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135582.

The product of its digits is 1714608, while the sum is 53.

The square root of 791443997 is about 28132.6144714635. The cubic root of 791443997 is about 924.9964439113.

The spelling of 791443997 in words is "seven hundred ninety-one million, four hundred forty-three thousand, nine hundred ninety-seven".