180913 has 4 divisors (see below), whose sum is σ = 182628. Its totient is φ = 179200.

The previous prime is 180907. The next prime is 180949. The reversal of 180913 is 319081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97969 + 82944 = 313^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 180913 - 2¹³ = 172721 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (180413) 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, 688 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (45657).

2¹⁸⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

180913 is a deficient number, since it is larger than the sum of its proper divisors (1715).

180913 is a wasteful number, since it uses less digits than its factorization.

180913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 180913 is about 425.3386885765. The cubic root of 180913 is about 56.5574636603.

Adding to 180913 its reverse (319081), we get a palindrome (499994).

The spelling of 180913 in words is "one hundred eighty thousand, nine hundred thirteen".