864095389 has 2 divisors, whose sum is σ = 864095390. Its totient is φ = 864095388.

The previous prime is 864095381. The next prime is 864095399. The reversal of 864095389 is 983590468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731269764 + 132825625 = 27042^2 + 11525^2 .

It is a cyclic number.

It is not a de Polignac number, because 864095389 - 2³ = 864095381 is a prime.

It is a super-2 number, since 2×864095389² = 1493321682582122642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864095381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432047694 + 432047695.

It is an arithmetic number, because the mean of its divisors is an integer number (432047695).

Almost surely, 2^864095389 is an apocalyptic number.

It is an amenable number.

864095389 is a deficient number, since it is larger than the sum of its proper divisors (1).

864095389 is an equidigital number, since it uses as much as digits as its factorization.

864095389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 864095389 is about 29395.4994684561. The cubic root of 864095389 is about 952.4756809556.

The spelling of 864095389 in words is "eight hundred sixty-four million, ninety-five thousand, three hundred eighty-nine".