1998535593 has 8 divisors (see below), whose sum is σ = 2680671168. Its totient is φ = 1324378544.

The previous prime is 1998535541. The next prime is 1998535597. The reversal of 1998535593 is 3955358991.

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

It is a cyclic number.

It is not a de Polignac number, because 1998535593 - 2¹⁶ = 1998470057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1998535597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994046 + ... + 1995047.

It is an arithmetic number, because the mean of its divisors is an integer number (335083896).

Almost surely, 2^1998535593 is an apocalyptic number.

It is an amenable number.

1998535593 is a deficient number, since it is larger than the sum of its proper divisors (682135575).

1998535593 is a wasteful number, since it uses less digits than its factorization.

1998535593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989263.

The product of its digits is 6561000, while the sum is 57.

The square root of 1998535593 is about 44704.9839838915. The cubic root of 1998535593 is about 1259.6134686111.

The spelling of 1998535593 in words is "one billion, nine hundred ninety-eight million, five hundred thirty-five thousand, five hundred ninety-three".