83299279 has 4 divisors (see below), whose sum is σ = 95199184. Its totient is φ = 71399376.

The previous prime is 83299243. The next prime is 83299289. The reversal of 83299279 is 97299238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97299238 = 2 ⋅48649619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83299279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83299219) 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 3 ways as a sum of consecutive naturals, for example, 5949942 + ... + 5949955.

It is an arithmetic number, because the mean of its divisors is an integer number (23799796).

Almost surely, 2^83299279 is an apocalyptic number.

83299279 is a deficient number, since it is larger than the sum of its proper divisors (11899905).

83299279 is a wasteful number, since it uses less digits than its factorization.

83299279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11899904.

The product of its digits is 489888, while the sum is 49.

The square root of 83299279 is about 9126.8438685013. The cubic root of 83299279 is about 436.7307258609.

The spelling of 83299279 in words is "eighty-three million, two hundred ninety-nine thousand, two hundred seventy-nine".