189152381 has 4 divisors (see below), whose sum is σ = 206348064. Its totient is φ = 171956700.

The previous prime is 189152357. The next prime is 189152401. The reversal of 189152381 is 183251981.

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: 183251981 = 11 ⋅16659271.

It is a cyclic number.

It is not a de Polignac number, because 189152381 - 2¹⁰ = 189151357 is a prime.

It is a super-2 number, since 2×189152381² = 71557246475938322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189152321) 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, 8597825 + ... + 8597846.

It is an arithmetic number, because the mean of its divisors is an integer number (51587016).

Almost surely, 2^189152381 is an apocalyptic number.

189152381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

189152381 is a deficient number, since it is larger than the sum of its proper divisors (17195683).

189152381 is a wasteful number, since it uses less digits than its factorization.

189152381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17195682.

The product of its digits is 17280, while the sum is 38.

The square root of 189152381 is about 13753.2680116400. The cubic root of 189152381 is about 574.0335432247.

The spelling of 189152381 in words is "one hundred eighty-nine million, one hundred fifty-two thousand, three hundred eighty-one".