999598 has 8 divisors (see below), whose sum is σ = 1513008. Its totient is φ = 495264.

The previous prime is 999563. The next prime is 999599. The reversal of 999598 is 895999.

999598 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999599) 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, 1986 + ... + 2437.

It is an arithmetic number, because the mean of its divisors is an integer number (189126).

2⁹⁹⁹⁵⁹⁸ is an apocalyptic number.

999598 is a deficient number, since it is larger than the sum of its proper divisors (513410).

999598 is a wasteful number, since it uses less digits than its factorization.

999598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538.

The product of its digits is 262440, while the sum is 49.

The square root of 999598 is about 999.7989797954. The cubic root of 999598 is about 99.9865982040.

The spelling of 999598 in words is "nine hundred ninety-nine thousand, five hundred ninety-eight".