189187473 has 4 divisors (see below), whose sum is σ = 252249968. Its totient is φ = 126124980.

The previous prime is 189187429. The next prime is 189187477. The reversal of 189187473 is 374781981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 189187473 - 2⁶ = 189187409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189187477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31531243 + ... + 31531248.

It is an arithmetic number, because the mean of its divisors is an integer number (63062492).

Almost surely, 2^189187473 is an apocalyptic number.

It is an amenable number.

189187473 is a deficient number, since it is larger than the sum of its proper divisors (63062495).

189187473 is an equidigital number, since it uses as much as digits as its factorization.

189187473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63062494.

The product of its digits is 338688, while the sum is 48.

The square root of 189187473 is about 13754.5437219851. The cubic root of 189187473 is about 574.0690397194.

The spelling of 189187473 in words is "one hundred eighty-nine million, one hundred eighty-seven thousand, four hundred seventy-three".