189895155 has 8 divisors (see below), whose sum is σ = 303832272. Its totient is φ = 101277408.

The previous prime is 189895141. The next prime is 189895159. The reversal of 189895155 is 551598981.

It is a happy number.

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

It is not a de Polignac number, because 189895155 - 2⁶ = 189895091 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 189895098 and 189895107.

It is not an unprimeable number, because it can be changed into a prime (189895159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329824 + ... + 6329853.

It is an arithmetic number, because the mean of its divisors is an integer number (37979034).

Almost surely, 2^189895155 is an apocalyptic number.

189895155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189895155 is a deficient number, since it is larger than the sum of its proper divisors (113937117).

189895155 is a wasteful number, since it uses less digits than its factorization.

189895155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659685.

The product of its digits is 648000, while the sum is 51.

The square root of 189895155 is about 13780.2450994168. The cubic root of 189895155 is about 574.7839440320.

The spelling of 189895155 in words is "one hundred eighty-nine million, eight hundred ninety-five thousand, one hundred fifty-five".