189404641 has 8 divisors (see below), whose sum is σ = 192466368. Its totient is φ = 186354000.

The previous prime is 189404639. The next prime is 189404651. The reversal of 189404641 is 146404981.

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 189404641 - 2¹ = 189404639 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 189404641.

It is not an unprimeable number, because it can be changed into a prime (189404651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35946 + ... + 40876.

It is an arithmetic number, because the mean of its divisors is an integer number (24058296).

Almost surely, 2^189404641 is an apocalyptic number.

It is an amenable number.

189404641 is a deficient number, since it is larger than the sum of its proper divisors (3061727).

189404641 is an equidigital number, since it uses as much as digits as its factorization.

189404641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 189404641 is about 13762.4358672439. The cubic root of 189404641 is about 574.2886133713.

The spelling of 189404641 in words is "one hundred eighty-nine million, four hundred four thousand, six hundred forty-one".