83584661 has 2 divisors, whose sum is σ = 83584662. Its totient is φ = 83584660.

The previous prime is 83584643. The next prime is 83584663. The reversal of 83584661 is 16648538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 16443025 = 8194^2 + 4055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83584661 is a prime.

Together with 83584663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83584663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41792330 + 41792331.

It is an arithmetic number, because the mean of its divisors is an integer number (41792331).

Almost surely, 2^83584661 is an apocalyptic number.

It is an amenable number.

83584661 is a deficient number, since it is larger than the sum of its proper divisors (1).

83584661 is an equidigital number, since it uses as much as digits as its factorization.

83584661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 83584661 is about 9142.4647114441. The cubic root of 83584661 is about 437.2289015442.

The spelling of 83584661 in words is "eighty-three million, five hundred eighty-four thousand, six hundred sixty-one".