189689679 has 6 divisors (see below), whose sum is σ = 273996216. Its totient is φ = 126459780.

The previous prime is 189689653. The next prime is 189689681. The reversal of 189689679 is 976986981.

It is a de Polignac number, because none of the positive numbers 2^k-189689679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189689699) 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, 10538307 + ... + 10538324.

It is an arithmetic number, because the mean of its divisors is an integer number (45666036).

Almost surely, 2^189689679 is an apocalyptic number.

189689679 is a deficient number, since it is larger than the sum of its proper divisors (84306537).

189689679 is a wasteful number, since it uses less digits than its factorization.

189689679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076637 (or 21076634 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 189689679 is about 13772.7876263304. The cubic root of 189689679 is about 574.5765542761.

The spelling of 189689679 in words is "one hundred eighty-nine million, six hundred eighty-nine thousand, six hundred seventy-nine".