189904869 has 24 divisors (see below), whose sum is σ = 341994432. Its totient is φ = 98651520.

The previous prime is 189904849. The next prime is 189904877. The reversal of 189904869 is 968409981.

It is not a de Polignac number, because 189904869 - 2¹⁵ = 189872101 is a prime.

It is a super-2 number, since 2×189904869² = 72127718539814322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189904849) 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 23 ways as a sum of consecutive naturals, for example, 136324 + ... + 137709.

It is an arithmetic number, because the mean of its divisors is an integer number (14249768).

Almost surely, 2^189904869 is an apocalyptic number.

It is an amenable number.

189904869 is a deficient number, since it is larger than the sum of its proper divisors (152089563).

189904869 is a wasteful number, since it uses less digits than its factorization.

189904869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274057 (or 274054 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 189904869 is about 13780.5975559843. The cubic root of 189904869 is about 574.7937448017.

The spelling of 189904869 in words is "one hundred eighty-nine million, nine hundred four thousand, eight hundred sixty-nine".