42009829 has 8 divisors (see below), whose sum is σ = 42829920. Its totient is φ = 41193456.

The previous prime is 42009823. The next prime is 42009841. The reversal of 42009829 is 92890024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42009829 - 2⁵ = 42009797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42009794 and 42009803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42009823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34027 + ... + 35239.

It is an arithmetic number, because the mean of its divisors is an integer number (5353740).

Almost surely, 2^42009829 is an apocalyptic number.

It is an amenable number.

42009829 is a deficient number, since it is larger than the sum of its proper divisors (820091).

42009829 is a wasteful number, since it uses less digits than its factorization.

42009829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 42009829 is about 6481.4989778600. The cubic root of 42009829 is about 347.6297781403.

The spelling of 42009829 in words is "forty-two million, nine thousand, eight hundred twenty-nine".