189945297 has 8 divisors (see below), whose sum is σ = 281400480. Its totient is φ = 126630180.

The previous prime is 189945281. The next prime is 189945317. The reversal of 189945297 is 792549981.

189945297 is a `hidden beast` number, since 18 + 99 + 452 + 97 = 666.

189945297 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 189945297 - 2⁴ = 189945281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189945227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3517479 + ... + 3517532.

It is an arithmetic number, because the mean of its divisors is an integer number (35175060).

Almost surely, 2^189945297 is an apocalyptic number.

It is an amenable number.

189945297 is a deficient number, since it is larger than the sum of its proper divisors (91455183).

189945297 is an equidigital number, since it uses as much as digits as its factorization.

189945297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035020 (or 7035014 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 189945297 is about 13782.0643228799. The cubic root of 189945297 is about 574.8345303326.

The spelling of 189945297 in words is "one hundred eighty-nine million, nine hundred forty-five thousand, two hundred ninety-seven".