40829 has 2 divisors, whose sum is σ = 40830. Its totient is φ = 40828.

The previous prime is 40823. The next prime is 40841. The reversal of 40829 is 92804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40804 + 25 = 202^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 40829 - 2⁴ = 40813 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20414 + 20415.

It is an arithmetic number, because the mean of its divisors is an integer number (20415).

2⁴⁰⁸²⁹ is an apocalyptic number.

It is an amenable number.

40829 is a deficient number, since it is larger than the sum of its proper divisors (1).

40829 is an equidigital number, since it uses as much as digits as its factorization.

40829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40829 is about 202.0618717126. The cubic root of 40829 is about 34.4341669727.

The spelling of 40829 in words is "forty thousand, eight hundred twenty-nine".