83421599 has 4 divisors (see below), whose sum is σ = 83673960. Its totient is φ = 83169240.

The previous prime is 83421577. The next prime is 83421617. The reversal of 83421599 is 99512438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99512438 = 2 ⋅49756219.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83421599 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 (83421509) 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, 125684 + ... + 126345.

It is an arithmetic number, because the mean of its divisors is an integer number (20918490).

Almost surely, 2^83421599 is an apocalyptic number.

83421599 is a deficient number, since it is larger than the sum of its proper divisors (252361).

83421599 is a wasteful number, since it uses less digits than its factorization.

83421599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252360.

The product of its digits is 77760, while the sum is 41.

The square root of 83421599 is about 9133.5425219353. The cubic root of 83421599 is about 436.9443922771.

The spelling of 83421599 in words is "eighty-three million, four hundred twenty-one thousand, five hundred ninety-nine".