181435073 has 2 divisors, whose sum is σ = 181435074. Its totient is φ = 181435072.

The previous prime is 181435069. The next prime is 181435081. The reversal of 181435073 is 370534181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102171664 + 79263409 = 10108^2 + 8903^2 .

It is a cyclic number.

It is not a de Polignac number, because 181435073 - 2² = 181435069 is a prime.

It is not a weakly prime, because it can be changed into another prime (181435673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90717536 + 90717537.

It is an arithmetic number, because the mean of its divisors is an integer number (90717537).

Almost surely, 2^181435073 is an apocalyptic number.

It is an amenable number.

181435073 is a deficient number, since it is larger than the sum of its proper divisors (1).

181435073 is an equidigital number, since it uses as much as digits as its factorization.

181435073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 181435073 is about 13469.7837027920. The cubic root of 181435073 is about 566.1181532357.

The spelling of 181435073 in words is "one hundred eighty-one million, four hundred thirty-five thousand, seventy-three".