864451769 has 2 divisors, whose sum is σ = 864451770. Its totient is φ = 864451768.

The previous prime is 864451741. The next prime is 864451787. The reversal of 864451769 is 967154468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828691369 + 35760400 = 28787^2 + 5980^2 .

It is a cyclic number.

It is not a de Polignac number, because 864451769 - 2¹² = 864447673 is a prime.

It is a super-2 number, since 2×864451769² = 1494553721854458722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (864451729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432225884 + 432225885.

It is an arithmetic number, because the mean of its divisors is an integer number (432225885).

Almost surely, 2^864451769 is an apocalyptic number.

It is an amenable number.

864451769 is a deficient number, since it is larger than the sum of its proper divisors (1).

864451769 is an equidigital number, since it uses as much as digits as its factorization.

864451769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 864451769 is about 29401.5606558563. The cubic root of 864451769 is about 952.6066065581.

The spelling of 864451769 in words is "eight hundred sixty-four million, four hundred fifty-one thousand, seven hundred sixty-nine".