189613709 has 8 divisors (see below), whose sum is σ = 191227392. Its totient is φ = 188006320.

The previous prime is 189613691. The next prime is 189613717. The reversal of 189613709 is 907316981.

189613709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189613709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189613709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689613709) 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, 73292 + ... + 75834.

It is an arithmetic number, because the mean of its divisors is an integer number (23903424).

Almost surely, 2^189613709 is an apocalyptic number.

It is an amenable number.

189613709 is a deficient number, since it is larger than the sum of its proper divisors (1613683).

189613709 is a wasteful number, since it uses less digits than its factorization.

189613709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 189613709 is about 13770.0293754226. The cubic root of 189613709 is about 574.4998387871.

The spelling of 189613709 in words is "one hundred eighty-nine million, six hundred thirteen thousand, seven hundred nine".