864803239 has 4 divisors (see below), whose sum is σ = 864862056. Its totient is φ = 864744424.

The previous prime is 864803131. The next prime is 864803263. The reversal of 864803239 is 932308468.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 864803239 - 2¹³ = 864795047 is a prime.

It is a super-2 number, since 2×864803239² = 1495769284369782242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864803195 and 864803204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864803539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14457 + ... + 44029.

It is an arithmetic number, because the mean of its divisors is an integer number (216215514).

Almost surely, 2^864803239 is an apocalyptic number.

864803239 is a deficient number, since it is larger than the sum of its proper divisors (58817).

864803239 is a wasteful number, since it uses less digits than its factorization.

864803239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58816.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 864803239 is about 29407.5371121078. The cubic root of 864803239 is about 952.7356931037.

The spelling of 864803239 in words is "eight hundred sixty-four million, eight hundred three thousand, two hundred thirty-nine".