83424421 has 4 divisors (see below), whose sum is σ = 87815200. Its totient is φ = 79033644.

The previous prime is 83424403. The next prime is 83424433. The reversal of 83424421 is 12442438.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 83424421 - 2⁷ = 83424293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83424421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83424401) 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, 2195361 + ... + 2195398.

It is an arithmetic number, because the mean of its divisors is an integer number (21953800).

Almost surely, 2^83424421 is an apocalyptic number.

It is an amenable number.

83424421 is a deficient number, since it is larger than the sum of its proper divisors (4390779).

83424421 is a wasteful number, since it uses less digits than its factorization.

83424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390778.

The product of its digits is 6144, while the sum is 28.

The square root of 83424421 is about 9133.6970061416. The cubic root of 83424421 is about 436.9493192312.

Adding to 83424421 its reverse (12442438), we get a palindrome (95866859).

It can be divided in two parts, 83424 and 421, that added together give a triangular number (83845 = T₄₀₉).

The spelling of 83424421 in words is "eighty-three million, four hundred twenty-four thousand, four hundred twenty-one".