189190505 has 32 divisors (see below), whose sum is σ = 277032960. Its totient is φ = 121141440.

The previous prime is 189190499. The next prime is 189190511. The reversal of 189190505 is 505091981.

189190505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189190499) and next prime (189190511).

It is a de Polignac number, because none of the positive numbers 2^k-189190505 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45212 + ... + 49218.

It is an arithmetic number, because the mean of its divisors is an integer number (8657280).

Almost surely, 2^189190505 is an apocalyptic number.

It is an amenable number.

189190505 is a deficient number, since it is larger than the sum of its proper divisors (87842455).

189190505 is a wasteful number, since it uses less digits than its factorization.

189190505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 189190505 is about 13754.6539396671. The cubic root of 189190505 is about 574.0721064623.

The spelling of 189190505 in words is "one hundred eighty-nine million, one hundred ninety thousand, five hundred five".