40864069 has 2 divisors, whose sum is σ = 40864070. Its totient is φ = 40864068.

The previous prime is 40864051. The next prime is 40864091. The reversal of 40864069 is 96046804.

40864069 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 can be written as a sum of positive squares in only one way, i.e., 35402500 + 5461569 = 5950^2 + 2337^2 .

It is a cyclic number.

It is not a de Polignac number, because 40864069 - 2¹¹ = 40862021 is a prime.

It is a super-2 number, since 2×40864069² = 3339744270473522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40834069) 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, 20432034 + 20432035.

It is an arithmetic number, because the mean of its divisors is an integer number (20432035).

Almost surely, 2^40864069 is an apocalyptic number.

It is an amenable number.

40864069 is a deficient number, since it is larger than the sum of its proper divisors (1).

40864069 is an equidigital number, since it uses as much as digits as its factorization.

40864069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 40864069 is about 6392.5009972623. The cubic root of 40864069 is about 344.4402292659.

The spelling of 40864069 in words is "forty million, eight hundred sixty-four thousand, sixty-nine".