791800649 has 2 divisors, whose sum is σ = 791800650. Its totient is φ = 791800648.

The previous prime is 791800643. The next prime is 791800673. The reversal of 791800649 is 946008197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709263424 + 82537225 = 26632^2 + 9085^2 .

It is a cyclic number.

It is not a de Polignac number, because 791800649 - 2⁸ = 791800393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (791800643) 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 as a sum of consecutive naturals, namely, 395900324 + 395900325.

It is an arithmetic number, because the mean of its divisors is an integer number (395900325).

Almost surely, 2^791800649 is an apocalyptic number.

It is an amenable number.

791800649 is a deficient number, since it is larger than the sum of its proper divisors (1).

791800649 is an equidigital number, since it uses as much as digits as its factorization.

791800649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 791800649 is about 28138.9525213715. The cubic root of 791800649 is about 925.1353681605.

The spelling of 791800649 in words is "seven hundred ninety-one million, eight hundred thousand, six hundred forty-nine".