180742813 has 2 divisors, whose sum is σ = 180742814. Its totient is φ = 180742812.

The previous prime is 180742781. The next prime is 180742829. The reversal of 180742813 is 318247081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140825689 + 39917124 = 11867^2 + 6318^2 .

It is an emirp because it is prime and its reverse (318247081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180742813 - 2⁵ = 180742781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180742843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90371406 + 90371407.

It is an arithmetic number, because the mean of its divisors is an integer number (90371407).

Almost surely, 2^180742813 is an apocalyptic number.

It is an amenable number.

180742813 is a deficient number, since it is larger than the sum of its proper divisors (1).

180742813 is an equidigital number, since it uses as much as digits as its factorization.

180742813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 180742813 is about 13444.0623696857. The cubic root of 180742813 is about 565.3972333786.

Adding to 180742813 its reverse (318247081), we get a palindrome (498989894).

The spelling of 180742813 in words is "one hundred eighty million, seven hundred forty-two thousand, eight hundred thirteen".