39983021 has 4 divisors (see below), whose sum is σ = 43058652. Its totient is φ = 36907392.

The previous prime is 39982981. The next prime is 39983063. The reversal of 39983021 is 12038993.

39983021 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 9302500 + 30680521 = 3050^2 + 5539^2 .

It is a cyclic number.

It is not a de Polignac number, because 39983021 - 2¹⁴ = 39966637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39983071) 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, 1537796 + ... + 1537821.

It is an arithmetic number, because the mean of its divisors is an integer number (10764663).

Almost surely, 2^39983021 is an apocalyptic number.

It is an amenable number.

39983021 is a deficient number, since it is larger than the sum of its proper divisors (3075631).

39983021 is a wasteful number, since it uses less digits than its factorization.

39983021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075630.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 39983021 is about 6323.2128700527. The cubic root of 39983021 is about 341.9467930177.

The spelling of 39983021 in words is "thirty-nine million, nine hundred eighty-three thousand, twenty-one".