189395689 has 4 divisors (see below), whose sum is σ = 216452224. Its totient is φ = 162339156.

The previous prime is 189395683. The next prime is 189395707. The reversal of 189395689 is 986593981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986593981 = 19 ⋅51925999.

It is not a de Polignac number, because 189395689 - 2¹⁷ = 189264617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189395683) 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, 13528257 + ... + 13528270.

It is an arithmetic number, because the mean of its divisors is an integer number (54113056).

Almost surely, 2^189395689 is an apocalyptic number.

It is an amenable number.

189395689 is a deficient number, since it is larger than the sum of its proper divisors (27056535).

189395689 is an equidigital number, since it uses as much as digits as its factorization.

189395689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27056534.

The product of its digits is 4199040, while the sum is 58.

The square root of 189395689 is about 13762.1106302776. The cubic root of 189395689 is about 574.2795655242.

The spelling of 189395689 in words is "one hundred eighty-nine million, three hundred ninety-five thousand, six hundred eighty-nine".