40683821 has 8 divisors (see below), whose sum is σ = 41096184. Its totient is φ = 40273920.

The previous prime is 40683809. The next prime is 40683823. The reversal of 40683821 is 12838604.

40683821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3290596 + 37393225 = 1814^2 + 6115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40683821 - 2¹⁴ = 40667437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40683823) 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 in 7 ways as a sum of consecutive naturals, for example, 53081 + ... + 53841.

It is an arithmetic number, because the mean of its divisors is an integer number (5137023).

Almost surely, 2^40683821 is an apocalyptic number.

It is an amenable number.

40683821 is a deficient number, since it is larger than the sum of its proper divisors (412363).

40683821 is a wasteful number, since it uses less digits than its factorization.

40683821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 40683821 is about 6378.3870218105. The cubic root of 40683821 is about 343.9330504513.

The spelling of 40683821 in words is "forty million, six hundred eighty-three thousand, eight hundred twenty-one".