189399982 has 4 divisors (see below), whose sum is σ = 284099976. Its totient is φ = 94699990.

The previous prime is 189399979. The next prime is 189399983. The reversal of 189399982 is 289993981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289993981 = 563 ⋅515087.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189399983) 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 as a sum of consecutive naturals, namely, 47349994 + ... + 47349997.

It is an arithmetic number, because the mean of its divisors is an integer number (71024994).

Almost surely, 2^189399982 is an apocalyptic number.

189399982 is a deficient number, since it is larger than the sum of its proper divisors (94699994).

189399982 is an equidigital number, since it uses as much as digits as its factorization.

189399982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94699993.

The product of its digits is 2519424, while the sum is 58.

The square root of 189399982 is about 13762.2666011090. The cubic root of 189399982 is about 574.2839045240.

The spelling of 189399982 in words is "one hundred eighty-nine million, three hundred ninety-nine thousand, nine hundred eighty-two".