189249995 has 16 divisors (see below), whose sum is σ = 249004800. Its totient is φ = 136936800.

The previous prime is 189249989. The next prime is 189249997. The reversal of 189249995 is 599942981.

It is not a de Polignac number, because 189249995 - 2⁴ = 189249979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189249995.

It is not an unprimeable number, because it can be changed into a prime (189249997) 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 15 ways as a sum of consecutive naturals, for example, 2300 + ... + 19590.

It is an arithmetic number, because the mean of its divisors is an integer number (15562800).

Almost surely, 2^189249995 is an apocalyptic number.

189249995 is a deficient number, since it is larger than the sum of its proper divisors (59754805).

189249995 is a wasteful number, since it uses less digits than its factorization.

189249995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17506.

The product of its digits is 2099520, while the sum is 56.

The square root of 189249995 is about 13756.8163104695. The cubic root of 189249995 is about 574.1322715160.

The spelling of 189249995 in words is "one hundred eighty-nine million, two hundred forty-nine thousand, nine hundred ninety-five".