189475985 has 8 divisors (see below), whose sum is σ = 228060096. Its totient is φ = 151121520.

The previous prime is 189475967. The next prime is 189475987. The reversal of 189475985 is 589574981.

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

It is not a de Polignac number, because 189475985 - 2¹⁸ = 189213841 is a prime.

It is a super-2 number, since 2×189475985² = 71802297783440450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189475985.

It is not an unprimeable number, because it can be changed into a prime (189475987) 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 7 ways as a sum of consecutive naturals, for example, 55589 + ... + 58898.

It is an arithmetic number, because the mean of its divisors is an integer number (28507512).

Almost surely, 2^189475985 is an apocalyptic number.

It is an amenable number.

189475985 is a deficient number, since it is larger than the sum of its proper divisors (38584111).

189475985 is a wasteful number, since it uses less digits than its factorization.

189475985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114823.

The product of its digits is 3628800, while the sum is 56.

The square root of 189475985 is about 13765.0276062200. The cubic root of 189475985 is about 574.3607110477.

The spelling of 189475985 in words is "one hundred eighty-nine million, four hundred seventy-five thousand, nine hundred eighty-five".