189166505 has 16 divisors (see below), whose sum is σ = 247912704. Its totient is φ = 137422080.

The previous prime is 189166501. The next prime is 189166517. The reversal of 189166505 is 505661981.

It is not a de Polignac number, because 189166505 - 2² = 189166501 is a prime.

It is a super-2 number, since 2×189166505² = 71567933227830050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189166501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77057 + ... + 79473.

It is an arithmetic number, because the mean of its divisors is an integer number (15494544).

Almost surely, 2^189166505 is an apocalyptic number.

It is an amenable number.

189166505 is a deficient number, since it is larger than the sum of its proper divisors (58746199).

189166505 is a wasteful number, since it uses less digits than its factorization.

189166505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 189166505 is about 13753.7814800149. The cubic root of 189166505 is about 574.0478305556.

The spelling of 189166505 in words is "one hundred eighty-nine million, one hundred sixty-six thousand, five hundred five".