40065579 has 12 divisors (see below), whose sum is σ = 58329856. Its totient is φ = 26499312.

The previous prime is 40065577. The next prime is 40065581. The reversal of 40065579 is 97556004.

40065579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40065577) and next prime (40065581).

It is not a de Polignac number, because 40065579 - 2¹ = 40065577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40065577) 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 11 ways as a sum of consecutive naturals, for example, 16384 + ... + 18669.

Almost surely, 2^40065579 is an apocalyptic number.

40065579 is a deficient number, since it is larger than the sum of its proper divisors (18264277).

40065579 is a wasteful number, since it uses less digits than its factorization.

40065579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35186 (or 35183 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 40065579 is about 6329.7376722894. The cubic root of 40065579 is about 342.1819848113.

The spelling of 40065579 in words is "forty million, sixty-five thousand, five hundred seventy-nine".