189421495 has 16 divisors (see below), whose sum is σ = 231235200. Its totient is φ = 148932864.

The previous prime is 189421481. The next prime is 189421513. The reversal of 189421495 is 594124981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189421495 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 126642 + ... + 128128.

It is an arithmetic number, because the mean of its divisors is an integer number (14452200).

Almost surely, 2^189421495 is an apocalyptic number.

189421495 is a deficient number, since it is larger than the sum of its proper divisors (41813705).

189421495 is a wasteful number, since it uses less digits than its factorization.

189421495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914.

The product of its digits is 103680, while the sum is 43.

The square root of 189421495 is about 13763.0481725525. The cubic root of 189421495 is about 574.3056470497.

The spelling of 189421495 in words is "one hundred eighty-nine million, four hundred twenty-one thousand, four hundred ninety-five".