189679109 has 8 divisors (see below), whose sum is σ = 200031840. Its totient is φ = 179363376.

The previous prime is 189679099. The next prime is 189679121. The reversal of 189679109 is 901976981.

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 189679109 - 2⁴ = 189679093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189679129) 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, 1622 + ... + 19544.

It is an arithmetic number, because the mean of its divisors is an integer number (25003980).

Almost surely, 2^189679109 is an apocalyptic number.

189679109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

189679109 is a deficient number, since it is larger than the sum of its proper divisors (10352731).

189679109 is a wasteful number, since it uses less digits than its factorization.

189679109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18499.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 189679109 is about 13772.4038932933. The cubic root of 189679109 is about 574.5658817801.

The spelling of 189679109 in words is "one hundred eighty-nine million, six hundred seventy-nine thousand, one hundred nine".