868239549 has 12 divisors (see below), whose sum is σ = 1261819936. Its totient is φ = 575274312.

The previous prime is 868239529. The next prime is 868239551. The reversal of 868239549 is 945932868.

868239549 is a `hidden beast` number, since 8 + 68 + 2 + 39 + 549 = 666.

It is not a de Polignac number, because 868239549 - 2⁵ = 868239517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 868239495 and 868239504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868239509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294457 + ... + 297390.

Almost surely, 2^868239549 is an apocalyptic number.

It is an amenable number.

868239549 is a deficient number, since it is larger than the sum of its proper divisors (393580387).

868239549 is a wasteful number, since it uses less digits than its factorization.

868239549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592016 (or 592013 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 868239549 is about 29465.9048562911. The cubic root of 868239549 is about 953.9959290730.

The spelling of 868239549 in words is "eight hundred sixty-eight million, two hundred thirty-nine thousand, five hundred forty-nine".