189019155 has 32 divisors (see below), whose sum is σ = 327398400. Its totient is φ = 92568960.

The previous prime is 189019133. The next prime is 189019169. The reversal of 189019155 is 551910981.

It is not a de Polignac number, because 189019155 - 2⁶ = 189019091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36370 + ... + 41240.

It is an arithmetic number, because the mean of its divisors is an integer number (10231200).

Almost surely, 2^189019155 is an apocalyptic number.

189019155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189019155 is a deficient number, since it is larger than the sum of its proper divisors (138379245).

189019155 is a wasteful number, since it uses less digits than its factorization.

189019155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091.

The product of its (nonzero) digits is 16200, while the sum is 39.

The square root of 189019155 is about 13748.4237278315. The cubic root of 189019155 is about 573.8987415825.

The spelling of 189019155 in words is "one hundred eighty-nine million, nineteen thousand, one hundred fifty-five".