181329713 has 4 divisors (see below), whose sum is σ = 185187840. Its totient is φ = 177471588.

The previous prime is 181329697. The next prime is 181329719. The reversal of 181329713 is 317923181.

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.

It is a cyclic number.

It is not a de Polignac number, because 181329713 - 2⁴ = 181329697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181329719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928993 + ... + 1929086.

It is an arithmetic number, because the mean of its divisors is an integer number (46296960).

Almost surely, 2^181329713 is an apocalyptic number.

It is an amenable number.

181329713 is a deficient number, since it is larger than the sum of its proper divisors (3858127).

181329713 is an equidigital number, since it uses as much as digits as its factorization.

181329713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858126.

The product of its digits is 9072, while the sum is 35.

The square root of 181329713 is about 13465.8721589060. The cubic root of 181329713 is about 566.0085497341.

The spelling of 181329713 in words is "one hundred eighty-one million, three hundred twenty-nine thousand, seven hundred thirteen".