189005553 has 12 divisors (see below), whose sum is σ = 297827088. Its totient is φ = 114548760.

The previous prime is 189005533. The next prime is 189005569. The reversal of 189005553 is 355500981.

It is a happy number.

189005553 is a `hidden beast` number, since 18 + 90 + 0 + 5 + 553 = 666.

It is not a de Polignac number, because 189005553 - 2¹² = 189001457 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189005533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 954475 + ... + 954672.

It is an arithmetic number, because the mean of its divisors is an integer number (24818924).

Almost surely, 2^189005553 is an apocalyptic number.

It is an amenable number.

189005553 is a deficient number, since it is larger than the sum of its proper divisors (108821535).

189005553 is a wasteful number, since it uses less digits than its factorization.

189005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909164 (or 1909161 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 189005553 is about 13747.9290440415. The cubic root of 189005553 is about 573.8849751507.

The spelling of 189005553 in words is "one hundred eighty-nine million, five thousand, five hundred fifty-three".