189912361 has 4 divisors (see below), whose sum is σ = 189939924. Its totient is φ = 189884800.

The previous prime is 189912343. The next prime is 189912407. The reversal of 189912361 is 163219981.

189912361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 49632025 + 140280336 = 7045^2 + 11844^2 .

It is a cyclic number.

It is not a de Polignac number, because 189912361 - 2¹¹ = 189910313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189912061) 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, 6801 + ... + 20641.

It is an arithmetic number, because the mean of its divisors is an integer number (47484981).

Almost surely, 2^189912361 is an apocalyptic number.

It is an amenable number.

189912361 is a deficient number, since it is larger than the sum of its proper divisors (27563).

189912361 is a wasteful number, since it uses less digits than its factorization.

189912361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27562.

The product of its digits is 23328, while the sum is 40.

The square root of 189912361 is about 13780.8693847667. The cubic root of 189912361 is about 574.8013034952.

The spelling of 189912361 in words is "one hundred eighty-nine million, nine hundred twelve thousand, three hundred sixty-one".