189887061 has 32 divisors (see below), whose sum is σ = 312659200. Its totient is φ = 99823104.

The previous prime is 189887053. The next prime is 189887063. The reversal of 189887061 is 160788981.

189887061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189887061 - 2³ = 189887053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189887061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189887063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94281 + ... + 96273.

It is an arithmetic number, because the mean of its divisors is an integer number (9770600).

Almost surely, 2^189887061 is an apocalyptic number.

It is an amenable number.

189887061 is a deficient number, since it is larger than the sum of its proper divisors (122772139).

189887061 is a wasteful number, since it uses less digits than its factorization.

189887061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 193536, while the sum is 48.

The square root of 189887061 is about 13779.9514150087. The cubic root of 189887061 is about 574.7757774776.

The spelling of 189887061 in words is "one hundred eighty-nine million, eight hundred eighty-seven thousand, sixty-one".