864509393 has 8 divisors (see below), whose sum is σ = 943315200. Its totient is φ = 785739280.

The previous prime is 864509363. The next prime is 864509407. The reversal of 864509393 is 393905468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864509393 - 2⁸ = 864509137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864509333) 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 in 7 ways as a sum of consecutive naturals, for example, 82496 + ... + 92382.

It is an arithmetic number, because the mean of its divisors is an integer number (117914400).

Almost surely, 2^864509393 is an apocalyptic number.

It is an amenable number.

864509393 is a deficient number, since it is larger than the sum of its proper divisors (78805807).

864509393 is a wasteful number, since it uses less digits than its factorization.

864509393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 864509393 is about 29402.5405875071. The cubic root of 864509393 is about 952.6277728762.

It can be divided in two parts, 86450 and 9393, that multiplied together give a triangular number (812024850 = T₄₀₂₉₉).

The spelling of 864509393 in words is "eight hundred sixty-four million, five hundred nine thousand, three hundred ninety-three".