864356497 has 2 divisors, whose sum is σ = 864356498. Its totient is φ = 864356496.

The previous prime is 864356413. The next prime is 864356503. The reversal of 864356497 is 794653468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 823919616 + 40436881 = 28704^2 + 6359^2 .

It is a cyclic number.

It is not a de Polignac number, because 864356497 - 2⁷ = 864356369 is a prime.

It is a super-2 number, since 2×864356497² = 1494224307812222018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (864356407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432178248 + 432178249.

It is an arithmetic number, because the mean of its divisors is an integer number (432178249).

Almost surely, 2^864356497 is an apocalyptic number.

It is an amenable number.

864356497 is a deficient number, since it is larger than the sum of its proper divisors (1).

864356497 is an equidigital number, since it uses as much as digits as its factorization.

864356497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 52.

The square root of 864356497 is about 29399.9404251097. The cubic root of 864356497 is about 952.5716093980.

The spelling of 864356497 in words is "eight hundred sixty-four million, three hundred fifty-six thousand, four hundred ninety-seven".