83365813 has 2 divisors, whose sum is σ = 83365814. Its totient is φ = 83365812.

The previous prime is 83365811. The next prime is 83365819. The reversal of 83365813 is 31856338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59336209 + 24029604 = 7703^2 + 4902^2 .

It is a cyclic number.

It is not a de Polignac number, because 83365813 - 2¹ = 83365811 is a prime.

Together with 83365811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83365811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41682906 + 41682907.

It is an arithmetic number, because the mean of its divisors is an integer number (41682907).

Almost surely, 2^83365813 is an apocalyptic number.

It is an amenable number.

83365813 is a deficient number, since it is larger than the sum of its proper divisors (1).

83365813 is an equidigital number, since it uses as much as digits as its factorization.

83365813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 83365813 is about 9130.4881030534. The cubic root of 83365813 is about 436.8469722018.

The spelling of 83365813 in words is "eighty-three million, three hundred sixty-five thousand, eight hundred thirteen".