864891893 has 8 divisors (see below), whose sum is σ = 870378240. Its totient is φ = 859422960.

The previous prime is 864891889. The next prime is 864891919. The reversal of 864891893 is 398198468.

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 864891893 - 2² = 864891889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864891193) 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, 103568 + ... + 111606.

It is an arithmetic number, because the mean of its divisors is an integer number (108797280).

Almost surely, 2^864891893 is an apocalyptic number.

It is an amenable number.

864891893 is a deficient number, since it is larger than the sum of its proper divisors (5486347).

864891893 is a wasteful number, since it uses less digits than its factorization.

864891893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707.

The product of its digits is 2985984, while the sum is 56.

The square root of 864891893 is about 29409.0444081408. The cubic root of 864891893 is about 952.7682480789.

The spelling of 864891893 in words is "eight hundred sixty-four million, eight hundred ninety-one thousand, eight hundred ninety-three".