90049471 has 2 divisors, whose sum is σ = 90049472. Its totient is φ = 90049470.

The previous prime is 90049469. The next prime is 90049511. The reversal of 90049471 is 17494009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90049471 - 2¹ = 90049469 is a prime.

It is a super-3 number, since 3×90049471³ (a number of 25 digits) contains 333 as substring.

Together with 90049469, 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 (90049411) 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, 45024735 + 45024736.

It is an arithmetic number, because the mean of its divisors is an integer number (45024736).

Almost surely, 2^90049471 is an apocalyptic number.

90049471 is a deficient number, since it is larger than the sum of its proper divisors (1).

90049471 is an equidigital number, since it uses as much as digits as its factorization.

90049471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 90049471 is about 9489.4399729383. The cubic root of 90049471 is about 448.2225705689. Note that the first 3 decimals are identical.

The spelling of 90049471 in words is "ninety million, forty-nine thousand, four hundred seventy-one".