189667983 has 16 divisors (see below), whose sum is σ = 259209216. Its totient is φ = 123305760.

The previous prime is 189667939. The next prime is 189667993. The reversal of 189667983 is 389766981.

It is a Cunningham number, because it is equal to 13772²-1.

It is not a de Polignac number, because 189667983 - 2¹⁴ = 189651599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189667993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39018 + ... + 43608.

It is an arithmetic number, because the mean of its divisors is an integer number (16200576).

Almost surely, 2^189667983 is an apocalyptic number.

189667983 is a deficient number, since it is larger than the sum of its proper divisors (69541233).

189667983 is a wasteful number, since it uses less digits than its factorization.

189667983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934.

The product of its digits is 3919104, while the sum is 57.

The square root of 189667983 is about 13771.9999636945. Note that the first 4 decimals coincide. The cubic root of 189667983 is about 574.5546474644.

The spelling of 189667983 in words is "one hundred eighty-nine million, six hundred sixty-seven thousand, nine hundred eighty-three".