181360013 has 4 divisors (see below), whose sum is σ = 187210368. Its totient is φ = 175509660.

The previous prime is 181360001. The next prime is 181360093. The reversal of 181360013 is 310063181.

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: 310063181 = 1229 ⋅252289.

It is a cyclic number.

It is not a de Polignac number, because 181360013 - 2⁶ = 181359949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181360093) 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, 2925131 + ... + 2925192.

It is an arithmetic number, because the mean of its divisors is an integer number (46802592).

Almost surely, 2^181360013 is an apocalyptic number.

It is an amenable number.

181360013 is a deficient number, since it is larger than the sum of its proper divisors (5850355).

181360013 is an equidigital number, since it uses as much as digits as its factorization.

181360013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850354.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 181360013 is about 13466.9971782874. The cubic root of 181360013 is about 566.0400744516.

The spelling of 181360013 in words is "one hundred eighty-one million, three hundred sixty thousand, thirteen".