791320399 has 2 divisors, whose sum is σ = 791320400. Its totient is φ = 791320398.

The previous prime is 791320391. The next prime is 791320429. The reversal of 791320399 is 993023197.

It is a weak prime.

It is an emirp because it is prime and its reverse (993023197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 791320399 - 2³ = 791320391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791320391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395660199 + 395660200.

It is an arithmetic number, because the mean of its divisors is an integer number (395660200).

Almost surely, 2^791320399 is an apocalyptic number.

791320399 is a deficient number, since it is larger than the sum of its proper divisors (1).

791320399 is an equidigital number, since it uses as much as digits as its factorization.

791320399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 791320399 is about 28130.4176826438. The cubic root of 791320399 is about 924.9482898778.

The spelling of 791320399 in words is "seven hundred ninety-one million, three hundred twenty thousand, three hundred ninety-nine".