83254721 has 4 divisors (see below), whose sum is σ = 90823344. Its totient is φ = 75686100.

The previous prime is 83254711. The next prime is 83254739. The reversal of 83254721 is 12745238.

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-83254721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83254711) 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, 3784295 + ... + 3784316.

It is an arithmetic number, because the mean of its divisors is an integer number (22705836).

Almost surely, 2^83254721 is an apocalyptic number.

It is an amenable number.

83254721 is a deficient number, since it is larger than the sum of its proper divisors (7568623).

83254721 is a wasteful number, since it uses less digits than its factorization.

83254721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7568622.

The product of its digits is 13440, while the sum is 32.

The square root of 83254721 is about 9124.4025009860. The cubic root of 83254721 is about 436.6528407590.

Adding to 83254721 its reverse (12745238), we get a palindrome (95999959).

The spelling of 83254721 in words is "eighty-three million, two hundred fifty-four thousand, seven hundred twenty-one".