181020713 has 2 divisors, whose sum is σ = 181020714. Its totient is φ = 181020712.

The previous prime is 181020659. The next prime is 181020727. The reversal of 181020713 is 317020181.

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., 120055849 + 60964864 = 10957^2 + 7808^2 .

It is a cyclic number.

It is not a de Polignac number, because 181020713 - 2²² = 176826409 is a prime.

It is not a weakly prime, because it can be changed into another prime (181020773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90510356 + 90510357.

It is an arithmetic number, because the mean of its divisors is an integer number (90510357).

Almost surely, 2^181020713 is an apocalyptic number.

It is an amenable number.

181020713 is a deficient number, since it is larger than the sum of its proper divisors (1).

181020713 is an equidigital number, since it uses as much as digits as its factorization.

181020713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 181020713 is about 13454.3938176344. The cubic root of 181020713 is about 565.6868593375.

Adding to 181020713 its reverse (317020181), we get a palindrome (498040894).

The spelling of 181020713 in words is "one hundred eighty-one million, twenty thousand, seven hundred thirteen".