189244981 has 8 divisors (see below), whose sum is σ = 198454680. Its totient is φ = 180214272.

The previous prime is 189244903. The next prime is 189245011. The reversal of 189244981 is 189442981.

It can be written as a sum of positive squares in 4 ways, for example, as 10595025 + 178649956 = 3255^2 + 13366^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189244981 - 2¹⁷ = 189113909 is a prime.

It is a super-2 number, since 2×189244981² = 71627325667380722, 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 (189244481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42580 + ... + 46813.

It is an arithmetic number, because the mean of its divisors is an integer number (24806835).

Almost surely, 2^189244981 is an apocalyptic number.

It is an amenable number.

189244981 is a deficient number, since it is larger than the sum of its proper divisors (9209699).

189244981 is an equidigital number, since it uses as much as digits as its factorization.

189244981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89495.

The product of its digits is 165888, while the sum is 46.

The square root of 189244981 is about 13756.6340723303. The cubic root of 189244981 is about 574.1272011070.

The spelling of 189244981 in words is "one hundred eighty-nine million, two hundred forty-four thousand, nine hundred eighty-one".