83479409 has 8 divisors (see below), whose sum is σ = 90435240. Its totient is φ = 77055888.

The previous prime is 83479391. The next prime is 83479423. The reversal of 83479409 is 90497438.

It can be written as a sum of positive squares in 4 ways, for example, as 6864400 + 76615009 = 2620^2 + 8753^2 .

It is a de Polignac number, because none of the positive numbers 2^k-83479409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83479409.

It is not an unprimeable number, because it can be changed into a prime (83479439) 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, 16802 + ... + 21195.

It is an arithmetic number, because the mean of its divisors is an integer number (11304405).

Almost surely, 2^83479409 is an apocalyptic number.

It is an amenable number.

83479409 is a deficient number, since it is larger than the sum of its proper divisors (6955831).

83479409 is an equidigital number, since it uses as much as digits as its factorization.

83479409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38036 (or 38010 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 83479409 is about 9136.7066823884. The cubic root of 83479409 is about 437.0453010864.

The spelling of 83479409 in words is "eighty-three million, four hundred seventy-nine thousand, four hundred nine".