864669269 has 2 divisors, whose sum is σ = 864669270. Its totient is φ = 864669268.

The previous prime is 864669263. The next prime is 864669277. The reversal of 864669269 is 962966468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 832611025 + 32058244 = 28855^2 + 5662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864669269 is a prime.

It is a super-2 number, since 2×864669269² = 1495305889505988722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864669263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432334634 + 432334635.

It is an arithmetic number, because the mean of its divisors is an integer number (432334635).

Almost surely, 2^864669269 is an apocalyptic number.

It is an amenable number.

864669269 is a deficient number, since it is larger than the sum of its proper divisors (1).

864669269 is an equidigital number, since it uses as much as digits as its factorization.

864669269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 56.

The square root of 864669269 is about 29405.2592064753. The cubic root of 864669269 is about 952.6864932447.

The spelling of 864669269 in words is "eight hundred sixty-four million, six hundred sixty-nine thousand, two hundred sixty-nine".