189954923 has 8 divisors (see below), whose sum is σ = 201439728. Its totient is φ = 178504704.

The previous prime is 189954917. The next prime is 189954937. The reversal of 189954923 is 329459981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189954923 - 2¹⁰ = 189953899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189954943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3140 + ... + 19742.

It is an arithmetic number, because the mean of its divisors is an integer number (25179966).

Almost surely, 2^189954923 is an apocalyptic number.

189954923 is a deficient number, since it is larger than the sum of its proper divisors (11484805).

189954923 is a wasteful number, since it uses less digits than its factorization.

189954923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17293.

The product of its digits is 699840, while the sum is 50.

The square root of 189954923 is about 13782.4135404507. The cubic root of 189954923 is about 574.8442406085.

The spelling of 189954923 in words is "one hundred eighty-nine million, nine hundred fifty-four thousand, nine hundred twenty-three".