797911649 has 2 divisors, whose sum is σ = 797911650. Its totient is φ = 797911648.

The previous prime is 797911637. The next prime is 797911657. The reversal of 797911649 is 946119797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417466624 + 380445025 = 20432^2 + 19505^2 .

It is a cyclic number.

It is not a de Polignac number, because 797911649 - 2⁸ = 797911393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 797911649.

It is not a weakly prime, because it can be changed into another prime (797911679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398955824 + 398955825.

It is an arithmetic number, because the mean of its divisors is an integer number (398955825).

Almost surely, 2^797911649 is an apocalyptic number.

It is an amenable number.

797911649 is a deficient number, since it is larger than the sum of its proper divisors (1).

797911649 is an equidigital number, since it uses as much as digits as its factorization.

797911649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 53.

The square root of 797911649 is about 28247.3299446160. The cubic root of 797911649 is about 927.5092905979.

The spelling of 797911649 in words is "seven hundred ninety-seven million, nine hundred eleven thousand, six hundred forty-nine".