189385499 has 12 divisors (see below), whose sum is σ = 197140656. Its totient is φ = 181801872.

The previous prime is 189385451. The next prime is 189385501. The reversal of 189385499 is 994583981.

It is not a de Polignac number, because 189385499 - 2²⁴ = 172608283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189385409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254522 + ... + 255264.

It is an arithmetic number, because the mean of its divisors is an integer number (16428388).

Almost surely, 2^189385499 is an apocalyptic number.

189385499 is a deficient number, since it is larger than the sum of its proper divisors (7755157).

189385499 is an frugal number, since it uses more digits than its factorization.

189385499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 863 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 56.

The square root of 189385499 is about 13761.7404059225. The cubic root of 189385499 is about 574.2692660752.

The spelling of 189385499 in words is "one hundred eighty-nine million, three hundred eighty-five thousand, four hundred ninety-nine".