83988479 has 4 divisors (see below), whose sum is σ = 87640176. Its totient is φ = 80336784.

The previous prime is 83988467. The next prime is 83988497. The reversal of 83988479 is 97488938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97488938 = 2 ⋅48744469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83988479 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 (83988419) 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, 1825814 + ... + 1825859.

It is an arithmetic number, because the mean of its divisors is an integer number (21910044).

Almost surely, 2^83988479 is an apocalyptic number.

83988479 is a deficient number, since it is larger than the sum of its proper divisors (3651697).

83988479 is a wasteful number, since it uses less digits than its factorization.

83988479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651696.

The product of its digits is 3483648, while the sum is 56.

The square root of 83988479 is about 9164.5228462807. The cubic root of 83988479 is about 437.9318906765.

The spelling of 83988479 in words is "eighty-three million, nine hundred eighty-eight thousand, four hundred seventy-nine".