189606899 has 4 divisors (see below), whose sum is σ = 200760264. Its totient is φ = 178453536.

The previous prime is 189606877. The next prime is 189606929. The reversal of 189606899 is 998606981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998606981 = 449 ⋅2224069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189606899 is a prime.

It is a super-2 number, since 2×189606899² = 71901552296792402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189606799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5576657 + ... + 5576690.

It is an arithmetic number, because the mean of its divisors is an integer number (50190066).

Almost surely, 2^189606899 is an apocalyptic number.

189606899 is a deficient number, since it is larger than the sum of its proper divisors (11153365).

189606899 is a wasteful number, since it uses less digits than its factorization.

189606899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11153364.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 189606899 is about 13769.7820970413. The cubic root of 189606899 is about 574.4929609603.

The spelling of 189606899 in words is "one hundred eighty-nine million, six hundred six thousand, eight hundred ninety-nine".