83209399 has 16 divisors (see below), whose sum is σ = 104507200. Its totient is φ = 65832480.

The previous prime is 83209397. The next prime is 83209421. The reversal of 83209399 is 99390238.

It is a happy number.

It is not a de Polignac number, because 83209399 - 2¹ = 83209397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83209391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4872 + ... + 13789.

It is an arithmetic number, because the mean of its divisors is an integer number (6531700).

Almost surely, 2^83209399 is an apocalyptic number.

83209399 is a deficient number, since it is larger than the sum of its proper divisors (21297801).

83209399 is a wasteful number, since it uses less digits than its factorization.

83209399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18695 (or 18681 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 83209399 is about 9121.9186030133. The cubic root of 83209399 is about 436.5735917107.

The spelling of 83209399 in words is "eighty-three million, two hundred nine thousand, three hundred ninety-nine".