83736409 has 2 divisors, whose sum is σ = 83736410. Its totient is φ = 83736408.

The previous prime is 83736397. The next prime is 83736481. The reversal of 83736409 is 90463738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83320384 + 416025 = 9128^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 83736409 - 2¹¹ = 83734361 is a prime.

It is not a weakly prime, because it can be changed into another prime (83736209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41868204 + 41868205.

It is an arithmetic number, because the mean of its divisors is an integer number (41868205).

Almost surely, 2^83736409 is an apocalyptic number.

It is an amenable number.

83736409 is a deficient number, since it is larger than the sum of its proper divisors (1).

83736409 is an equidigital number, since it uses as much as digits as its factorization.

83736409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 83736409 is about 9150.7600230801. The cubic root of 83736409 is about 437.4933380210.

The spelling of 83736409 in words is "eighty-three million, seven hundred thirty-six thousand, four hundred nine".