797991401 has 2 divisors, whose sum is σ = 797991402. Its totient is φ = 797991400.

The previous prime is 797991353. The next prime is 797991413. The reversal of 797991401 is 104199797.

797991401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538008025 + 259983376 = 23195^2 + 16124^2 .

It is a cyclic number.

It is not a de Polignac number, because 797991401 - 2¹⁰ = 797990377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (797991421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398995700 + 398995701.

It is an arithmetic number, because the mean of its divisors is an integer number (398995701).

Almost surely, 2^797991401 is an apocalyptic number.

It is an amenable number.

797991401 is a deficient number, since it is larger than the sum of its proper divisors (1).

797991401 is an equidigital number, since it uses as much as digits as its factorization.

797991401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 797991401 is about 28248.7415825909. The cubic root of 797991401 is about 927.5401913694.

The spelling of 797991401 in words is "seven hundred ninety-seven million, nine hundred ninety-one thousand, four hundred one".