83539661 has 2 divisors, whose sum is σ = 83539662. Its totient is φ = 83539660.

The previous prime is 83539613. The next prime is 83539663. The reversal of 83539661 is 16693538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 24157225 = 7706^2 + 4915^2 .

It is a cyclic number.

It is not a de Polignac number, because 83539661 - 2¹⁸ = 83277517 is a prime.

Together with 83539663, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4863767 and since 83539661 and 4863767 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83539663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41769830 + 41769831.

It is an arithmetic number, because the mean of its divisors is an integer number (41769831).

Almost surely, 2^83539661 is an apocalyptic number.

It is an amenable number.

83539661 is a deficient number, since it is larger than the sum of its proper divisors (1).

83539661 is an equidigital number, since it uses as much as digits as its factorization.

83539661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 83539661 is about 9140.0033369797. The cubic root of 83539661 is about 437.1504229003.

The spelling of 83539661 in words is "eighty-three million, five hundred thirty-nine thousand, six hundred sixty-one".