791338861 has 2 divisors, whose sum is σ = 791338862. Its totient is φ = 791338860.

The previous prime is 791338841. The next prime is 791338871. The reversal of 791338861 is 168833197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719258761 + 72080100 = 26819^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 791338861 - 2⁹ = 791338349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791338841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395669430 + 395669431.

It is an arithmetic number, because the mean of its divisors is an integer number (395669431).

Almost surely, 2^791338861 is an apocalyptic number.

It is an amenable number.

791338861 is a deficient number, since it is larger than the sum of its proper divisors (1).

791338861 is an equidigital number, since it uses as much as digits as its factorization.

791338861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 791338861 is about 28130.7458308521. The cubic root of 791338861 is about 924.9554830292.

The spelling of 791338861 in words is "seven hundred ninety-one million, three hundred thirty-eight thousand, eight hundred sixty-one".