73824581 has 2 divisors, whose sum is σ = 73824582. Its totient is φ = 73824580.

The previous prime is 73824577. The next prime is 73824587. The reversal of 73824581 is 18542837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73788100 + 36481 = 8590^2 + 191^2 .

It is an emirp because it is prime and its reverse (18542837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73824581 - 2² = 73824577 is a prime.

It is a super-2 number, since 2×73824581² = 10900137519651122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73824587) 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, 36912290 + 36912291.

It is an arithmetic number, because the mean of its divisors is an integer number (36912291).

Almost surely, 2^73824581 is an apocalyptic number.

It is an amenable number.

73824581 is a deficient number, since it is larger than the sum of its proper divisors (1).

73824581 is an equidigital number, since it uses as much as digits as its factorization.

73824581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 73824581 is about 8592.1231951131. The cubic root of 73824581 is about 419.5016405659.

The spelling of 73824581 in words is "seventy-three million, eight hundred twenty-four thousand, five hundred eighty-one".