83460821 has 4 divisors (see below), whose sum is σ = 83564544. Its totient is φ = 83357100.

The previous prime is 83460781. The next prime is 83460841. The reversal of 83460821 is 12806438.

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: 12806438 = 2 ⋅6403219.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83460821 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 (83460841) 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, 50645 + ... + 52266.

It is an arithmetic number, because the mean of its divisors is an integer number (20891136).

Almost surely, 2^83460821 is an apocalyptic number.

It is an amenable number.

83460821 is a deficient number, since it is larger than the sum of its proper divisors (103723).

83460821 is a wasteful number, since it uses less digits than its factorization.

83460821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103722.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 83460821 is about 9135.6894102197. The cubic root of 83460821 is about 437.0128603476.

The spelling of 83460821 in words is "eighty-three million, four hundred sixty thousand, eight hundred twenty-one".