181252369 has 3 divisors (see below), whose sum is σ = 181265833. Its totient is φ = 181238906.

The previous prime is 181252367. The next prime is 181252373. The reversal of 181252369 is 963252181.

The square root of 181252369 is 13463.

It is a perfect power (a square), and thus also a powerful number.

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 is not a de Polignac number, because 181252369 - 2¹ = 181252367 is a prime.

It is a super-2 number, since 2×181252369² = 65704842536224322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181252361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6732 + ... + 20194.

Almost surely, 2^181252369 is an apocalyptic number.

181252369 is the 13463-rd square number.

181252369 is the 6732-nd centered octagonal number.

It is an amenable number.

181252369 is a deficient number, since it is larger than the sum of its proper divisors (13464).

181252369 is an frugal number, since it uses more digits than its factorization.

181252369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26926 (or 13463 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The cubic root of 181252369 is about 565.9280635850.

The spelling of 181252369 in words is "one hundred eighty-one million, two hundred fifty-two thousand, three hundred sixty-nine".