83123993 has 4 divisors (see below), whose sum is σ = 87498960. Its totient is φ = 78749028.

The previous prime is 83123983. The next prime is 83124011. The reversal of 83123993 is 39932138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39932138 = 2 ⋅19966069.

It is a cyclic number.

It is not a de Polignac number, because 83123993 - 2¹⁶ = 83058457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83123923) 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, 2187455 + ... + 2187492.

It is an arithmetic number, because the mean of its divisors is an integer number (21874740).

Almost surely, 2^83123993 is an apocalyptic number.

It is an amenable number.

83123993 is a deficient number, since it is larger than the sum of its proper divisors (4374967).

83123993 is a wasteful number, since it uses less digits than its factorization.

83123993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374966.

The product of its digits is 34992, while the sum is 38.

The square root of 83123993 is about 9117.2360395023. The cubic root of 83123993 is about 436.4241744227.

The spelling of 83123993 in words is "eighty-three million, one hundred twenty-three thousand, nine hundred ninety-three".