797991031 has 2 divisors, whose sum is σ = 797991032. Its totient is φ = 797991030.

The previous prime is 797990993. The next prime is 797991079. The reversal of 797991031 is 130199797.

797991031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 797991031 - 2⁷ = 797990903 is a prime.

It is a super-2 number, since 2×797991031² = 1273579371112885922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797991091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398995515 + 398995516.

It is an arithmetic number, because the mean of its divisors is an integer number (398995516).

Almost surely, 2^797991031 is an apocalyptic number.

797991031 is a deficient number, since it is larger than the sum of its proper divisors (1).

797991031 is an equidigital number, since it uses as much as digits as its factorization.

797991031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107163, while the sum is 46.

The square root of 797991031 is about 28248.7350336258. The cubic root of 797991031 is about 927.5400480137.

The spelling of 797991031 in words is "seven hundred ninety-seven million, nine hundred ninety-one thousand, thirty-one".