868639013 has 8 divisors (see below), whose sum is σ = 950325600. Its totient is φ = 787405680.

The previous prime is 868638989. The next prime is 868639027. The reversal of 868639013 is 310936868.

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 868639013 - 2¹⁰ = 868637989 is a prime.

It is a super-2 number, since 2×868639013² = 1509067469811228338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868639033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109295 + ... + 116972.

It is an arithmetic number, because the mean of its divisors is an integer number (118790700).

Almost surely, 2^868639013 is an apocalyptic number.

It is an amenable number.

868639013 is a deficient number, since it is larger than the sum of its proper divisors (81686587).

868639013 is a wasteful number, since it uses less digits than its factorization.

868639013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226627.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 868639013 is about 29472.6824873475. The cubic root of 868639013 is about 954.1422130492.

The spelling of 868639013 in words is "eight hundred sixty-eight million, six hundred thirty-nine thousand, thirteen".