73853681 has 12 divisors (see below), whose sum is σ = 81515700. Its totient is φ = 66860640.

The previous prime is 73853671. The next prime is 73853683. The reversal of 73853681 is 18635837.

It can be written as a sum of positive squares in 2 ways, for example, as 3964081 + 69889600 = 1991^2 + 8360^2 .

It is not a de Polignac number, because 73853681 - 2⁶ = 73853617 is a prime.

It is a super-2 number, since 2×73853681² = 10908732394499522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73853683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31415 + ... + 33683.

It is an arithmetic number, because the mean of its divisors is an integer number (6792975).

Almost surely, 2^73853681 is an apocalyptic number.

It is an amenable number.

73853681 is a deficient number, since it is larger than the sum of its proper divisors (7662019).

73853681 is a wasteful number, since it uses less digits than its factorization.

73853681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2549 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 73853681 is about 8593.8164397432. The cubic root of 73853681 is about 419.5567527158.

The spelling of 73853681 in words is "seventy-three million, eight hundred fifty-three thousand, six hundred eighty-one".