189674923 has 4 divisors (see below), whose sum is σ = 192505960. Its totient is φ = 186843888.

The previous prime is 189674921. The next prime is 189674959. The reversal of 189674923 is 329476981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329476981 = 3533 ⋅93257.

It is a cyclic number.

It is not a de Polignac number, because 189674923 - 2¹ = 189674921 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189674921) 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, 1415418 + ... + 1415551.

It is an arithmetic number, because the mean of its divisors is an integer number (48126490).

Almost surely, 2^189674923 is an apocalyptic number.

189674923 is a deficient number, since it is larger than the sum of its proper divisors (2831037).

189674923 is an equidigital number, since it uses as much as digits as its factorization.

189674923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831036.

The product of its digits is 653184, while the sum is 49.

The square root of 189674923 is about 13772.2519218899. The cubic root of 189674923 is about 574.5616550794.

The spelling of 189674923 in words is "one hundred eighty-nine million, six hundred seventy-four thousand, nine hundred twenty-three".