860021799 has 16 divisors (see below), whose sum is σ = 1411318272. Its totient is φ = 453637728.

The previous prime is 860021797. The next prime is 860021807. The reversal of 860021799 is 997120068.

It is not a de Polignac number, because 860021799 - 2¹ = 860021797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 860021799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860021797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1574859 + ... + 1575404.

It is an arithmetic number, because the mean of its divisors is an integer number (88207392).

Almost surely, 2^860021799 is an apocalyptic number.

860021799 is a deficient number, since it is larger than the sum of its proper divisors (551296473).

860021799 is a wasteful number, since it uses less digits than its factorization.

860021799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150286.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 860021799 is about 29326.1282647403. The cubic root of 860021799 is about 950.9765761849.

The spelling of 860021799 in words is "eight hundred sixty million, twenty-one thousand, seven hundred ninety-nine".