83826979 has 4 divisors (see below), whose sum is σ = 84888160. Its totient is φ = 82765800.

The previous prime is 83826937. The next prime is 83826997. The reversal of 83826979 is 97962838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97962838 = 2 ⋅48981419.

It is a cyclic number.

It is not a de Polignac number, because 83826979 - 2¹⁹ = 83302691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83826679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530472 + ... + 530629.

It is an arithmetic number, because the mean of its divisors is an integer number (21222040).

Almost surely, 2^83826979 is an apocalyptic number.

83826979 is a deficient number, since it is larger than the sum of its proper divisors (1061181).

83826979 is a wasteful number, since it uses less digits than its factorization.

83826979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061180.

The product of its digits is 1306368, while the sum is 52.

The square root of 83826979 is about 9155.7074549158. The cubic root of 83826979 is about 437.6510133376.

The spelling of 83826979 in words is "eighty-three million, eight hundred twenty-six thousand, nine hundred seventy-nine".