189548989 has 4 divisors (see below), whose sum is σ = 216627424. Its totient is φ = 162470556.

The previous prime is 189548987. The next prime is 189548993. The reversal of 189548989 is 989845981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189548989 - 2¹ = 189548987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189548987) 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, 13539207 + ... + 13539220.

It is an arithmetic number, because the mean of its divisors is an integer number (54156856).

Almost surely, 2^189548989 is an apocalyptic number.

It is an amenable number.

189548989 is a deficient number, since it is larger than the sum of its proper divisors (27078435).

189548989 is an equidigital number, since it uses as much as digits as its factorization.

189548989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27078434.

The product of its digits is 7464960, while the sum is 61.

The square root of 189548989 is about 13767.6791435594. The cubic root of 189548989 is about 574.4344675280.

The spelling of 189548989 in words is "one hundred eighty-nine million, five hundred forty-eight thousand, nine hundred eighty-nine".