791855149 has 2 divisors, whose sum is σ = 791855150. Its totient is φ = 791855148.

The previous prime is 791855147. The next prime is 791855171. The reversal of 791855149 is 941558197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449864100 + 341991049 = 21210^2 + 18493^2 .

It is a cyclic number.

It is not a de Polignac number, because 791855149 - 2¹ = 791855147 is a prime.

Together with 791855147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791855147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395927574 + 395927575.

It is an arithmetic number, because the mean of its divisors is an integer number (395927575).

Almost surely, 2^791855149 is an apocalyptic number.

It is an amenable number.

791855149 is a deficient number, since it is larger than the sum of its proper divisors (1).

791855149 is an equidigital number, since it uses as much as digits as its factorization.

791855149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 49.

The square root of 791855149 is about 28139.9209131796. The cubic root of 791855149 is about 925.1565935034.

The spelling of 791855149 in words is "seven hundred ninety-one million, eight hundred fifty-five thousand, one hundred forty-nine".