83409909 has 8 divisors (see below), whose sum is σ = 121323552. Its totient is φ = 50551440.

The previous prime is 83409857. The next prime is 83409947. The reversal of 83409909 is 90990438.

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

It is not a de Polignac number, because 83409909 - 2⁹ = 83409397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83409979) 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, 1263754 + ... + 1263819.

It is an arithmetic number, because the mean of its divisors is an integer number (15165444).

Almost surely, 2^83409909 is an apocalyptic number.

It is an amenable number.

83409909 is a deficient number, since it is larger than the sum of its proper divisors (37913643).

83409909 is a wasteful number, since it uses less digits than its factorization.

83409909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527587.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 83409909 is about 9132.9025506681. The cubic root of 83409909 is about 436.9239814218.

The spelling of 83409909 in words is "eighty-three million, four hundred nine thousand, nine hundred nine".