40069429 has 2 divisors, whose sum is σ = 40069430. Its totient is φ = 40069428.

The previous prime is 40069411. The next prime is 40069441. The reversal of 40069429 is 92496004.

40069429 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., 40068900 + 529 = 6330^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 40069429 - 2⁵ = 40069397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40069394 and 40069403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40069129) 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, 20034714 + 20034715.

It is an arithmetic number, because the mean of its divisors is an integer number (20034715).

Almost surely, 2^40069429 is an apocalyptic number.

It is an amenable number.

40069429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40069429 is an equidigital number, since it uses as much as digits as its factorization.

40069429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 40069429 is about 6330.0417850122. The cubic root of 40069429 is about 342.1929448297.

The spelling of 40069429 in words is "forty million, sixty-nine thousand, four hundred twenty-nine".