83848721 has 4 divisors (see below), whose sum is σ = 91471344. Its totient is φ = 76226100.

The previous prime is 83848711. The next prime is 83848727. The reversal of 83848721 is 12784838.

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-83848721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83848727) 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, 3811295 + ... + 3811316.

It is an arithmetic number, because the mean of its divisors is an integer number (22867836).

Almost surely, 2^83848721 is an apocalyptic number.

It is an amenable number.

83848721 is a deficient number, since it is larger than the sum of its proper divisors (7622623).

83848721 is a wasteful number, since it uses less digits than its factorization.

83848721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7622622.

The product of its digits is 86016, while the sum is 41.

The square root of 83848721 is about 9156.8947247416. The cubic root of 83848721 is about 437.6888475604.

The spelling of 83848721 in words is "eighty-three million, eight hundred forty-eight thousand, seven hundred twenty-one".