189574813 has 4 divisors (see below), whose sum is σ = 189613120. Its totient is φ = 189536508.

The previous prime is 189574811. The next prime is 189574817. The reversal of 189574813 is 318475981.

It is a happy number.

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: 318475981 = 547 ⋅582223.

It is a cyclic number.

It is not a de Polignac number, because 189574813 - 2¹ = 189574811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189574811) 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, 10395 + ... + 22072.

It is an arithmetic number, because the mean of its divisors is an integer number (47403280).

Almost surely, 2^189574813 is an apocalyptic number.

It is an amenable number.

189574813 is a deficient number, since it is larger than the sum of its proper divisors (38307).

189574813 is an equidigital number, since it uses as much as digits as its factorization.

189574813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38306.

The product of its digits is 241920, while the sum is 46.

The square root of 189574813 is about 13768.6169603196. The cubic root of 189574813 is about 574.4605531715.

The spelling of 189574813 in words is "one hundred eighty-nine million, five hundred seventy-four thousand, eight hundred thirteen".