189507145 has 4 divisors (see below), whose sum is σ = 227408580. Its totient is φ = 151605712.

The previous prime is 189507139. The next prime is 189507161. The reversal of 189507145 is 541705981.

It is a happy number.

189507145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541705981 = 41 ⋅13212341.

It can be written as a sum of positive squares in 2 ways, for example, as 124010496 + 65496649 = 11136^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 189507145 - 2³ = 189507137 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 189507098 and 189507107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18950710 + ... + 18950719.

It is an arithmetic number, because the mean of its divisors is an integer number (56852145).

Almost surely, 2^189507145 is an apocalyptic number.

It is an amenable number.

189507145 is a deficient number, since it is larger than the sum of its proper divisors (37901435).

189507145 is an equidigital number, since it uses as much as digits as its factorization.

189507145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37901434.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 189507145 is about 13766.1594135765. The cubic root of 189507145 is about 574.3921945428.

The spelling of 189507145 in words is "one hundred eighty-nine million, five hundred seven thousand, one hundred forty-five".