189218867 has 4 divisors (see below), whose sum is σ = 189405216. Its totient is φ = 189032520.

The previous prime is 189218759. The next prime is 189218879. The reversal of 189218867 is 768812981.

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 189218867 - 2¹⁰ = 189217843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189212867) 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, 91643 + ... + 93684.

It is an arithmetic number, because the mean of its divisors is an integer number (47351304).

Almost surely, 2^189218867 is an apocalyptic number.

189218867 is a deficient number, since it is larger than the sum of its proper divisors (186349).

189218867 is a wasteful number, since it uses less digits than its factorization.

189218867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186348.

The product of its digits is 387072, while the sum is 50.

The square root of 189218867 is about 13755.6848975251. The cubic root of 189218867 is about 574.1007918687.

The spelling of 189218867 in words is "one hundred eighty-nine million, two hundred eighteen thousand, eight hundred sixty-seven".