189181441 has 4 divisors (see below), whose sum is σ = 190314432. Its totient is φ = 188048452.

The previous prime is 189181429. The next prime is 189181477. The reversal of 189181441 is 144181981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144181981 = 17 ⋅8481293.

It is a cyclic number.

It is not a de Polignac number, because 189181441 - 2⁵ = 189181409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189181441.

It is not an unprimeable number, because it can be changed into a prime (189181411) 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, 566245 + ... + 566578.

It is an arithmetic number, because the mean of its divisors is an integer number (47578608).

Almost surely, 2^189181441 is an apocalyptic number.

It is an amenable number.

189181441 is a deficient number, since it is larger than the sum of its proper divisors (1132991).

189181441 is a wasteful number, since it uses less digits than its factorization.

189181441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132990.

The product of its digits is 9216, while the sum is 37.

The square root of 189181441 is about 13754.3244472420. The cubic root of 189181441 is about 574.0629385028.

The spelling of 189181441 in words is "one hundred eighty-nine million, one hundred eighty-one thousand, four hundred forty-one".