189039623 has 4 divisors (see below), whose sum is σ = 194148840. Its totient is φ = 183930408.

The previous prime is 189039611. The next prime is 189039647. The reversal of 189039623 is 326930981.

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

It is a cyclic number.

It is not a de Polignac number, because 189039623 - 2¹⁰ = 189038599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189039523) 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, 2554553 + ... + 2554626.

It is an arithmetic number, because the mean of its divisors is an integer number (48537210).

Almost surely, 2^189039623 is an apocalyptic number.

189039623 is a deficient number, since it is larger than the sum of its proper divisors (5109217).

189039623 is an equidigital number, since it uses as much as digits as its factorization.

189039623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109216.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 189039623 is about 13749.1680839242. The cubic root of 189039623 is about 573.9194557715.

The spelling of 189039623 in words is "one hundred eighty-nine million, thirty-nine thousand, six hundred twenty-three".