189396523 has 4 divisors (see below), whose sum is σ = 189486328. Its totient is φ = 189306720.

The previous prime is 189396517. The next prime is 189396551. The reversal of 189396523 is 325693981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189396523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189396563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41661 + ... + 45982.

It is an arithmetic number, because the mean of its divisors is an integer number (47371582).

Almost surely, 2^189396523 is an apocalyptic number.

189396523 is a deficient number, since it is larger than the sum of its proper divisors (89805).

189396523 is an equidigital number, since it uses as much as digits as its factorization.

189396523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89804.

The product of its digits is 349920, while the sum is 46.

The square root of 189396523 is about 13762.1409308290. The cubic root of 189396523 is about 574.2804084657.

The spelling of 189396523 in words is "one hundred eighty-nine million, three hundred ninety-six thousand, five hundred twenty-three".