90448469 has 2 divisors, whose sum is σ = 90448470. Its totient is φ = 90448468.

The previous prime is 90448453. The next prime is 90448471. The reversal of 90448469 is 96484409.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 7091569 = 9130^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 90448469 - 2⁴ = 90448453 is a prime.

It is a super-2 number, since 2×90448469² = 16361851088887922, which contains 22 as substring.

Together with 90448471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90448499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45224234 + 45224235.

It is an arithmetic number, because the mean of its divisors is an integer number (45224235).

Almost surely, 2^90448469 is an apocalyptic number.

It is an amenable number.

90448469 is a deficient number, since it is larger than the sum of its proper divisors (1).

90448469 is an equidigital number, since it uses as much as digits as its factorization.

90448469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 90448469 is about 9510.4400003365. The cubic root of 90448469 is about 448.8836013571.

The spelling of 90448469 in words is "ninety million, four hundred forty-eight thousand, four hundred sixty-nine".