40983821 has 4 divisors (see below), whose sum is σ = 43394652. Its totient is φ = 38572992.

The previous prime is 40983797. The next prime is 40983841. The reversal of 40983821 is 12838904.

It is a happy number.

40983821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35271721 + 5712100 = 5939^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 40983821 - 2¹⁰ = 40982797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40983841) 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 3 ways as a sum of consecutive naturals, for example, 1205390 + ... + 1205423.

It is an arithmetic number, because the mean of its divisors is an integer number (10848663).

Almost surely, 2^40983821 is an apocalyptic number.

It is an amenable number.

40983821 is a deficient number, since it is larger than the sum of its proper divisors (2410831).

40983821 is a wasteful number, since it uses less digits than its factorization.

40983821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410830.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40983821 is about 6401.8607451272. The cubic root of 40983821 is about 344.7763613988.

The spelling of 40983821 in words is "forty million, nine hundred eighty-three thousand, eight hundred twenty-one".