189966245 has 32 divisors (see below), whose sum is σ = 281760768. Its totient is φ = 119973888.

The previous prime is 189966241. The next prime is 189966247. The reversal of 189966245 is 542669981.

It is a cyclic number.

It is not a de Polignac number, because 189966245 - 2² = 189966241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 189966193 and 189966202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189966241) 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, 24569 + ... + 31361.

It is an arithmetic number, because the mean of its divisors is an integer number (8805024).

Almost surely, 2^189966245 is an apocalyptic number.

It is an amenable number.

189966245 is a deficient number, since it is larger than the sum of its proper divisors (91794523).

189966245 is a wasteful number, since it uses less digits than its factorization.

189966245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869.

The product of its digits is 933120, while the sum is 50.

The square root of 189966245 is about 13782.8242751622. The cubic root of 189966245 is about 574.8556613131.

The spelling of 189966245 in words is "one hundred eighty-nine million, nine hundred sixty-six thousand, two hundred forty-five".