83868661 has 2 divisors, whose sum is σ = 83868662. Its totient is φ = 83868660.

The previous prime is 83868647. The next prime is 83868709. The reversal of 83868661 is 16686838.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66178225 + 17690436 = 8135^2 + 4206^2 .

It is a cyclic number.

It is not a de Polignac number, because 83868661 - 2¹¹ = 83866613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83868601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41934330 + 41934331.

It is an arithmetic number, because the mean of its divisors is an integer number (41934331).

Almost surely, 2^83868661 is an apocalyptic number.

It is an amenable number.

83868661 is a deficient number, since it is larger than the sum of its proper divisors (1).

83868661 is an equidigital number, since it uses as much as digits as its factorization.

83868661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 83868661 is about 9157.9834570718. The cubic root of 83868661 is about 437.7235402934.

The spelling of 83868661 in words is "eighty-three million, eight hundred sixty-eight thousand, six hundred sixty-one".