189921298 has 8 divisors (see below), whose sum is σ = 325579392. Its totient is φ = 81394836.

The previous prime is 189921289. The next prime is 189921299. The reversal of 189921298 is 892129981.

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

It is not an unprimeable number, because it can be changed into a prime (189921299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782890 + ... + 6782917.

It is an arithmetic number, because the mean of its divisors is an integer number (40697424).

Almost surely, 2^189921298 is an apocalyptic number.

189921298 is a deficient number, since it is larger than the sum of its proper divisors (135658094).

189921298 is a wasteful number, since it uses less digits than its factorization.

189921298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13565816.

The product of its digits is 186624, while the sum is 49.

The square root of 189921298 is about 13781.1936348054. The cubic root of 189921298 is about 574.8103197921.

The spelling of 189921298 in words is "one hundred eighty-nine million, nine hundred twenty-one thousand, two hundred ninety-eight".