189998419 has 6 divisors (see below), whose sum is σ = 205738116. Its totient is φ = 175383000.

The previous prime is 189998407. The next prime is 189998429. The reversal of 189998419 is 914899981.

189998419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189998419 - 2²¹ = 187901267 is a prime.

It is a super-2 number, since 2×189998419² = 72198798444999122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189998429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561957 + ... + 562294.

It is an arithmetic number, because the mean of its divisors is an integer number (34289686).

Almost surely, 2^189998419 is an apocalyptic number.

189998419 is a deficient number, since it is larger than the sum of its proper divisors (15739697).

189998419 is a wasteful number, since it uses less digits than its factorization.

189998419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124277 (or 1124264 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 58.

The square root of 189998419 is about 13783.9914030733. The cubic root of 189998419 is about 574.8881133276. Note that the first 3 decimals are identical.

The spelling of 189998419 in words is "one hundred eighty-nine million, nine hundred ninety-eight thousand, four hundred nineteen".