189898983 has 6 divisors (see below), whose sum is σ = 274298544. Its totient is φ = 126599316.

The previous prime is 189898981. The next prime is 189899009. The reversal of 189898983 is 389898981.

189898983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189898983 - 2¹ = 189898981 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 189898983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189898981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10549935 + ... + 10549952.

It is an arithmetic number, because the mean of its divisors is an integer number (45716424).

Almost surely, 2^189898983 is an apocalyptic number.

189898983 is a deficient number, since it is larger than the sum of its proper divisors (84399561).

189898983 is a wasteful number, since it uses less digits than its factorization.

189898983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21099893 (or 21099890 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 63.

The square root of 189898983 is about 13780.3839931984. The cubic root of 189898983 is about 574.7878062653.

It can be divided in two parts, 18989 and 8983, that added together give a palindrome (27972).

The spelling of 189898983 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-three".