189168687 has 6 divisors (see below), whose sum is σ = 273243672. Its totient is φ = 126112452.

The previous prime is 189168649. The next prime is 189168689. The reversal of 189168687 is 786861981.

It is not a de Polignac number, because 189168687 - 2⁷ = 189168559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189168689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10509363 + ... + 10509380.

It is an arithmetic number, because the mean of its divisors is an integer number (45540612).

Almost surely, 2^189168687 is an apocalyptic number.

189168687 is a deficient number, since it is larger than the sum of its proper divisors (84074985).

189168687 is a wasteful number, since it uses less digits than its factorization.

189168687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21018749 (or 21018746 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 189168687 is about 13753.8608034253. The cubic root of 189168687 is about 574.0500377249.

The spelling of 189168687 in words is "one hundred eighty-nine million, one hundred sixty-eight thousand, six hundred eighty-seven".