73933681 has 2 divisors, whose sum is σ = 73933682. Its totient is φ = 73933680.

The previous prime is 73933669. The next prime is 73933711. The reversal of 73933681 is 18633937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72590400 + 1343281 = 8520^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 73933681 - 2⁹ = 73933169 is a prime.

It is a super-2 number, since 2×73933681² = 10932378372419522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73933621) 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, 36966840 + 36966841.

It is an arithmetic number, because the mean of its divisors is an integer number (36966841).

Almost surely, 2^73933681 is an apocalyptic number.

It is an amenable number.

73933681 is a deficient number, since it is larger than the sum of its proper divisors (1).

73933681 is an equidigital number, since it uses as much as digits as its factorization.

73933681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 73933681 is about 8598.4696894273. The cubic root of 73933681 is about 419.7081892128.

The spelling of 73933681 in words is "seventy-three million, nine hundred thirty-three thousand, six hundred eighty-one".