90898243 has 2 divisors, whose sum is σ = 90898244. Its totient is φ = 90898242.

The previous prime is 90898229. The next prime is 90898273. The reversal of 90898243 is 34289809.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34289809) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90898243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90898243.

It is not a weakly prime, because it can be changed into another prime (90898273) 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, 45449121 + 45449122.

It is an arithmetic number, because the mean of its divisors is an integer number (45449122).

Almost surely, 2^90898243 is an apocalyptic number.

90898243 is a deficient number, since it is larger than the sum of its proper divisors (1).

90898243 is an equidigital number, since it uses as much as digits as its factorization.

90898243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 90898243 is about 9534.0570063326. The cubic root of 90898243 is about 449.6264274089.

The spelling of 90898243 in words is "ninety million, eight hundred ninety-eight thousand, two hundred forty-three".