797912189 has 2 divisors, whose sum is σ = 797912190. Its totient is φ = 797912188.

The previous prime is 797912173. The next prime is 797912207. The reversal of 797912189 is 981219797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447660964 + 350251225 = 21158^2 + 18715^2 .

It is an emirp because it is prime and its reverse (981219797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797912189 - 2⁴ = 797912173 is a prime.

It is a super-2 number, since 2×797912189² = 1273327722709543442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 797912189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797912149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398956094 + 398956095.

It is an arithmetic number, because the mean of its divisors is an integer number (398956095).

Almost surely, 2^797912189 is an apocalyptic number.

It is an amenable number.

797912189 is a deficient number, since it is larger than the sum of its proper divisors (1).

797912189 is an equidigital number, since it uses as much as digits as its factorization.

797912189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 53.

The square root of 797912189 is about 28247.3395030399. The cubic root of 797912189 is about 927.5094998337.

The spelling of 797912189 in words is "seven hundred ninety-seven million, nine hundred twelve thousand, one hundred eighty-nine".