189894983 has 2 divisors, whose sum is σ = 189894984. Its totient is φ = 189894982.

The previous prime is 189894961. The next prime is 189895001. The reversal of 189894983 is 389498981.

It is a strong prime.

It is an emirp because it is prime and its reverse (389498981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189894983 - 2¹² = 189890887 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189891983) 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, 94947491 + 94947492.

It is an arithmetic number, because the mean of its divisors is an integer number (94947492).

Almost surely, 2^189894983 is an apocalyptic number.

189894983 is a deficient number, since it is larger than the sum of its proper divisors (1).

189894983 is an equidigital number, since it uses as much as digits as its factorization.

189894983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 59.

The square root of 189894983 is about 13780.2388585975. The cubic root of 189894983 is about 574.7837704926.

The spelling of 189894983 in words is "one hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred eighty-three".