189484981 has 4 divisors (see below), whose sum is σ = 216554272. Its totient is φ = 162415692.

The previous prime is 189484979. The next prime is 189484993.

189484981 is nontrivially palindromic in base 10.

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 189484981 - 2¹ = 189484979 is a prime.

It is a super-2 number, since 2×189484981² = 71809116049140722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189484901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13534635 + ... + 13534648.

It is an arithmetic number, because the mean of its divisors is an integer number (54138568).

Almost surely, 2^189484981 is an apocalyptic number.

It is an amenable number.

189484981 is a deficient number, since it is larger than the sum of its proper divisors (27069291).

189484981 is an equidigital number, since it uses as much as digits as its factorization.

189484981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27069290.

The product of its digits is 663552, while the sum is 52.

The square root of 189484981 is about 13765.3543724817. The cubic root of 189484981 is about 574.3698007962.

The spelling of 189484981 in words is "one hundred eighty-nine million, four hundred eighty-four thousand, nine hundred eighty-one".