189155705 has 16 divisors (see below), whose sum is σ = 231413760. Its totient is φ = 148401792.

The previous prime is 189155699. The next prime is 189155717. The reversal of 189155705 is 507551981.

189155705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189155705 - 2¹⁰ = 189154681 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54842 + ... + 58188.

It is an arithmetic number, because the mean of its divisors is an integer number (14463360).

Almost surely, 2^189155705 is an apocalyptic number.

It is an amenable number.

189155705 is a deficient number, since it is larger than the sum of its proper divisors (42258055).

189155705 is a wasteful number, since it uses less digits than its factorization.

189155705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568.

The product of its (nonzero) digits is 63000, while the sum is 41.

The square root of 189155705 is about 13753.3888551149. The cubic root of 189155705 is about 574.0369057276.

The spelling of 189155705 in words is "one hundred eighty-nine million, one hundred fifty-five thousand, seven hundred five".