90686243 has 2 divisors, whose sum is σ = 90686244. Its totient is φ = 90686242.

The previous prime is 90686237. The next prime is 90686291. The reversal of 90686243 is 34268609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90686243 - 2⁶ = 90686179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90686197 and 90686206.

It is not a weakly prime, because it can be changed into another prime (90686203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45343121 + 45343122.

It is an arithmetic number, because the mean of its divisors is an integer number (45343122).

Almost surely, 2^90686243 is an apocalyptic number.

90686243 is a deficient number, since it is larger than the sum of its proper divisors (1).

90686243 is an equidigital number, since it uses as much as digits as its factorization.

90686243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 90686243 is about 9522.9324790214. The cubic root of 90686243 is about 449.2766039854.

The spelling of 90686243 in words is "ninety million, six hundred eighty-six thousand, two hundred forty-three".