82099409 has 12 divisors (see below), whose sum is σ = 99674304. Its totient is φ = 66229824.

The previous prime is 82099393. The next prime is 82099429. The reversal of 82099409 is 90499028.

It is not a de Polignac number, because 82099409 - 2⁴ = 82099393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82099429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18269 + ... + 22314.

It is an arithmetic number, because the mean of its divisors is an integer number (8306192).

Almost surely, 2^82099409 is an apocalyptic number.

It is an amenable number.

82099409 is a deficient number, since it is larger than the sum of its proper divisors (17574895).

82099409 is a wasteful number, since it uses less digits than its factorization.

82099409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40624 (or 40607 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 82099409 is about 9060.8724193645. The cubic root of 82099409 is about 434.6236388833.

The spelling of 82099409 in words is "eighty-two million, ninety-nine thousand, four hundred nine".