83668817 has 4 divisors (see below), whose sum is σ = 83702580. Its totient is φ = 83635056.

The previous prime is 83668813. The next prime is 83668829. The reversal of 83668817 is 71886638.

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 40844881 + 42823936 = 6391^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 83668817 - 2² = 83668813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83668813) 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, 12842 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (20925645).

Almost surely, 2^83668817 is an apocalyptic number.

It is an amenable number.

83668817 is a deficient number, since it is larger than the sum of its proper divisors (33763).

83668817 is a wasteful number, since it uses less digits than its factorization.

83668817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33762.

The product of its digits is 387072, while the sum is 47.

The square root of 83668817 is about 9147.0660323406. The cubic root of 83668817 is about 437.3755915106.

The spelling of 83668817 in words is "eighty-three million, six hundred sixty-eight thousand, eight hundred seventeen".