1598399999 has 16 divisors (see below), whose sum is σ = 1877686272. Its totient is φ = 1332138528.

The previous prime is 1598399987. The next prime is 1598400007. The reversal of 1598399999 is 9999938951.

It is not a de Polignac number, because 1598399999 - 2⁴ = 1598399983 is a prime.

1598399999 is a modest number, since divided by 99999 gives 15983 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1598399939) 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, 55217 + ... + 79029.

It is an arithmetic number, because the mean of its divisors is an integer number (117355392).

Almost surely, 2^1598399999 is an apocalyptic number.

1598399999 is a deficient number, since it is larger than the sum of its proper divisors (279286273).

1598399999 is a wasteful number, since it uses less digits than its factorization.

1598399999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24086.

The product of its digits is 63772920, while the sum is 71.

The square root of 1598399999 is about 39979.9949849922. The cubic root of 1598399999 is about 1169.2170959810.

The spelling of 1598399999 in words is "one billion, five hundred ninety-eight million, three hundred ninety-nine thousand, nine hundred ninety-nine".