189964874 has 8 divisors (see below), whose sum is σ = 310851648. Its totient is φ = 86347660.

The previous prime is 189964871. The next prime is 189964903. The reversal of 189964874 is 478469981.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189964871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4317362 + ... + 4317405.

It is an arithmetic number, because the mean of its divisors is an integer number (38856456).

Almost surely, 2^189964874 is an apocalyptic number.

189964874 is a deficient number, since it is larger than the sum of its proper divisors (120886774).

189964874 is a wasteful number, since it uses less digits than its factorization.

189964874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634780.

The product of its digits is 3483648, while the sum is 56.

The square root of 189964874 is about 13782.7745392573. The cubic root of 189964874 is about 574.8542783850.

The spelling of 189964874 in words is "one hundred eighty-nine million, nine hundred sixty-four thousand, eight hundred seventy-four".