2599989 has 24 divisors (see below), whose sum is σ = 4213440. Its totient is φ = 1419264.

The previous prime is 2599981. The next prime is 2599991. The reversal of 2599989 is 9899952.

It is not a de Polignac number, because 2599989 - 2³ = 2599981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2599981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2997 + ... + 3765.

It is an arithmetic number, because the mean of its divisors is an integer number (175560).

2^2599989 is an apocalyptic number.

It is an amenable number.

2599989 is a deficient number, since it is larger than the sum of its proper divisors (1613451).

2599989 is a wasteful number, since it uses less digits than its factorization.

2599989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 802 counting only the distinct ones).

The product of its digits is 524880, while the sum is 51.

The square root of 2599989 is about 1612.4481387009. The cubic root of 2599989 is about 137.5066927872.

The spelling of 2599989 in words is "two million, five hundred ninety-nine thousand, nine hundred eighty-nine".