8420829 has 8 divisors (see below), whose sum is σ = 11716032. Its totient is φ = 5369760.

The previous prime is 8420827. The next prime is 8420833. The reversal of 8420829 is 9280248.

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

It is not a de Polignac number, because 8420829 - 2¹ = 8420827 is a prime.

It is a super-2 number, since 2×8420829² = 141820722094482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8420829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420821) 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 in 7 ways as a sum of consecutive naturals, for example, 60952 + ... + 61089.

It is an arithmetic number, because the mean of its divisors is an integer number (1464504).

Almost surely, 2^8420829 is an apocalyptic number.

It is an amenable number.

8420829 is a deficient number, since it is larger than the sum of its proper divisors (3295203).

8420829 is a wasteful number, since it uses less digits than its factorization.

8420829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122067.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8420829 is about 2901.8664683269. The cubic root of 8420829 is about 203.4471526752.

The spelling of 8420829 in words is "eight million, four hundred twenty thousand, eight hundred twenty-nine".