189515 has 8 divisors (see below), whose sum is σ = 235440. Its totient is φ = 146272.

The previous prime is 189509. The next prime is 189517. The reversal of 189515 is 515981.

189515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 189515 - 2¹⁰ = 188491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (189517) 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, 509 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (29430).

2¹⁸⁹⁵¹⁵ is an apocalyptic number.

189515 is a deficient number, since it is larger than the sum of its proper divisors (45925).

189515 is a wasteful number, since it uses less digits than its factorization.

189515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its digits is 1800, while the sum is 29.

The square root of 189515 is about 435.3332057172. Note that the first 3 decimals coincide. The cubic root of 189515 is about 57.4400130547.

The spelling of 189515 in words is "one hundred eighty-nine thousand, five hundred fifteen".