83428417 has 4 divisors (see below), whose sum is σ = 83484720. Its totient is φ = 83372116.

The previous prime is 83428403. The next prime is 83428463. The reversal of 83428417 is 71482438.

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 a de Polignac number, because none of the positive numbers 2^k-83428417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83428517) 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, 25867 + ... + 28912.

It is an arithmetic number, because the mean of its divisors is an integer number (20871180).

Almost surely, 2^83428417 is an apocalyptic number.

It is an amenable number.

83428417 is a deficient number, since it is larger than the sum of its proper divisors (56303).

83428417 is a wasteful number, since it uses less digits than its factorization.

83428417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56302.

The product of its digits is 43008, while the sum is 37.

The square root of 83428417 is about 9133.9157539360. The cubic root of 83428417 is about 436.9562956919.

It can be divided in two parts, 83428 and 417, that added together give a triangular number (83845 = T₄₀₉).

The spelling of 83428417 in words is "eighty-three million, four hundred twenty-eight thousand, four hundred seventeen".