8420109 has 8 divisors (see below), whose sum is σ = 11260032. Its totient is φ = 5596800.

The previous prime is 8420051. The next prime is 8420119. The reversal of 8420109 is 9010248.

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

It is not a de Polignac number, because 8420109 - 2⁹ = 8419597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420119) 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, 2917 + ... + 5034.

It is an arithmetic number, because the mean of its divisors is an integer number (1407504).

Almost surely, 2^8420109 is an apocalyptic number.

It is an amenable number.

8420109 is a deficient number, since it is larger than the sum of its proper divisors (2839923).

8420109 is a wasteful number, since it uses less digits than its factorization.

8420109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8420109 is about 2901.7424075889. The cubic root of 8420109 is about 203.4413541121.

The spelling of 8420109 in words is "eight million, four hundred twenty thousand, one hundred nine".