189218929 has 8 divisors (see below), whose sum is σ = 200016000. Its totient is φ = 178505712.

The previous prime is 189218917. The next prime is 189218933. The reversal of 189218929 is 929812981.

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 189218929 - 2¹³ = 189210737 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 (189218969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294 + ... + 25375.

It is an arithmetic number, because the mean of its divisors is an integer number (25002000).

Almost surely, 2^189218929 is an apocalyptic number.

189218929 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

189218929 is a deficient number, since it is larger than the sum of its proper divisors (10797071).

189218929 is a wasteful number, since it uses less digits than its factorization.

189218929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41927.

The product of its digits is 186624, while the sum is 49.

The square root of 189218929 is about 13755.6871511386. The cubic root of 189218929 is about 574.1008545725.

The spelling of 189218929 in words is "one hundred eighty-nine million, two hundred eighteen thousand, nine hundred twenty-nine".