40429 has 2 divisors, whose sum is σ = 40430. Its totient is φ = 40428.

The previous prime is 40427. The next prime is 40433. The reversal of 40429 is 92404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39204 + 1225 = 198^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 40429 - 2¹ = 40427 is a prime.

Together with 40427, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20214 + 20215.

It is an arithmetic number, because the mean of its divisors is an integer number (20215).

2⁴⁰⁴²⁹ is an apocalyptic number.

It is an amenable number.

40429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40429 is an equidigital number, since it uses as much as digits as its factorization.

40429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 40429 is about 201.0696396774. The cubic root of 40429 is about 34.3213477084.

The spelling of 40429 in words is "forty thousand, four hundred twenty-nine".