599999989 has 4 divisors (see below), whose sum is σ = 635294124. Its totient is φ = 564705856.

The previous prime is 599999971. The next prime is 600000001. The reversal of 599999989 is 989999995.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989999995 = 5 ⋅197999999.

It can be written as a sum of positive squares in 2 ways, for example, as 349316100 + 250683889 = 18690^2 + 15833^2 .

It is a cyclic number.

It is not a de Polignac number, because 599999989 - 2⁵ = 599999957 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 (599999929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17647042 + ... + 17647075.

It is an arithmetic number, because the mean of its divisors is an integer number (158823531).

Almost surely, 2^599999989 is an apocalyptic number.

It is an amenable number.

599999989 is a deficient number, since it is larger than the sum of its proper divisors (35294135).

599999989 is a wasteful number, since it uses less digits than its factorization.

599999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35294134.

The product of its digits is 191318760, while the sum is 76.

The square root of 599999989 is about 24494.8972032952. The cubic root of 599999989 is about 843.4326601474.

The spelling of 599999989 in words is "five hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".