83215669 has 4 divisors (see below), whose sum is σ = 83237580. Its totient is φ = 83193760.

The previous prime is 83215667. The next prime is 83215711. The reversal of 83215669 is 96651238.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72080100 + 11135569 = 8490^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 83215669 - 2¹ = 83215667 is a prime.

It is a super-2 number, since 2×83215669² = 13849695134235122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83215661) 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, 3622 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (20809395).

Almost surely, 2^83215669 is an apocalyptic number.

It is an amenable number.

83215669 is a deficient number, since it is larger than the sum of its proper divisors (21911).

83215669 is a wasteful number, since it uses less digits than its factorization.

83215669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21910.

The product of its digits is 77760, while the sum is 40.

The square root of 83215669 is about 9122.2622742388. The cubic root of 83215669 is about 436.5845570091.

The spelling of 83215669 in words is "eighty-three million, two hundred fifteen thousand, six hundred sixty-nine".