40021337 has 2 divisors, whose sum is σ = 40021338. Its totient is φ = 40021336.

The previous prime is 40021313. The next prime is 40021339. The reversal of 40021337 is 73312004.

40021337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32993536 + 7027801 = 5744^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 40021337 - 2⁶ = 40021273 is a prime.

Together with 40021339, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40021339) 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 as a sum of consecutive naturals, namely, 20010668 + 20010669.

It is an arithmetic number, because the mean of its divisors is an integer number (20010669).

Almost surely, 2^40021337 is an apocalyptic number.

It is an amenable number.

40021337 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021337 is an equidigital number, since it uses as much as digits as its factorization.

40021337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 40021337 is about 6326.2419334072. The cubic root of 40021337 is about 342.0559881207.

The spelling of 40021337 in words is "forty million, twenty-one thousand, three hundred thirty-seven".