40559639 has 2 divisors, whose sum is σ = 40559640. Its totient is φ = 40559638.

The previous prime is 40559633. The next prime is 40559669. The reversal of 40559639 is 93695504.

40559639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40559639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40559596 and 40559605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40559633) 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, 20279819 + 20279820.

It is an arithmetic number, because the mean of its divisors is an integer number (20279820).

Almost surely, 2^40559639 is an apocalyptic number.

40559639 is a deficient number, since it is larger than the sum of its proper divisors (1).

40559639 is an equidigital number, since it uses as much as digits as its factorization.

40559639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 40559639 is about 6368.6449893207. The cubic root of 40559639 is about 343.5827570365.

The spelling of 40559639 in words is "forty million, five hundred fifty-nine thousand, six hundred thirty-nine".