860424889 has 3 divisors (see below), whose sum is σ = 860454223. Its totient is φ = 860395556.

The previous prime is 860424881. The next prime is 860424913. The reversal of 860424889 is 988424068.

The square root of 860424889 is 29333.

It is a perfect power (a square), and thus also a powerful number.

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 can be written as a sum of positive squares in only one way, i.e., 699338025 + 161086864 = 26445^2 + 12692^2 .

It is not a de Polignac number, because 860424889 - 2³ = 860424881 is a prime.

It is a super-2 number, since 2×860424889² = 1480661979221324642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860424881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14667 + ... + 43999.

Almost surely, 2^860424889 is an apocalyptic number.

860424889 is the 29333-rd square number.

860424889 is the 14667-th centered octagonal number.

It is an amenable number.

860424889 is a deficient number, since it is larger than the sum of its proper divisors (29334).

860424889 is an frugal number, since it uses more digits than its factorization.

860424889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58666 (or 29333 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The cubic root of 860424889 is about 951.1251264022.

Multiplying 860424889 by its sum of digits (49), we get a square (42160819561 = 205331²).

The spelling of 860424889 in words is "eight hundred sixty million, four hundred twenty-four thousand, eight hundred eighty-nine".