810985597 has 2 divisors, whose sum is σ = 810985598. Its totient is φ = 810985596.

The previous prime is 810985559. The next prime is 810985603. The reversal of 810985597 is 795589018.

810985597 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., 808492356 + 2493241 = 28434^2 + 1579^2 .

It is a cyclic number.

It is not a de Polignac number, because 810985597 - 2¹¹ = 810983549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810985537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405492798 + 405492799.

It is an arithmetic number, because the mean of its divisors is an integer number (405492799).

Almost surely, 2^810985597 is an apocalyptic number.

It is an amenable number.

810985597 is a deficient number, since it is larger than the sum of its proper divisors (1).

810985597 is an equidigital number, since it uses as much as digits as its factorization.

810985597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 52.

The square root of 810985597 is about 28477.8088518060. The cubic root of 810985597 is about 932.5476823723.

The spelling of 810985597 in words is "eight hundred ten million, nine hundred eighty-five thousand, five hundred ninety-seven".