83721283 has 4 divisors (see below), whose sum is σ = 84900528. Its totient is φ = 82542040.

The previous prime is 83721271. The next prime is 83721299. The reversal of 83721283 is 38212738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83721283 - 2²¹ = 81624131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83721203) 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, 589516 + ... + 589657.

It is an arithmetic number, because the mean of its divisors is an integer number (21225132).

Almost surely, 2^83721283 is an apocalyptic number.

83721283 is a deficient number, since it is larger than the sum of its proper divisors (1179245).

83721283 is a wasteful number, since it uses less digits than its factorization.

83721283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179244.

The product of its digits is 16128, while the sum is 34.

The square root of 83721283 is about 9149.9334970261. The cubic root of 83721283 is about 437.4669937549.

The spelling of 83721283 in words is "eighty-three million, seven hundred twenty-one thousand, two hundred eighty-three".