90144647 has 2 divisors, whose sum is σ = 90144648. Its totient is φ = 90144646.

The previous prime is 90144619. The next prime is 90144661. The reversal of 90144647 is 74644109.

It is a strong prime.

It is an emirp because it is prime and its reverse (74644109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90144647 - 2¹⁰ = 90143623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90144667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45072323 + 45072324.

It is an arithmetic number, because the mean of its divisors is an integer number (45072324).

Almost surely, 2^90144647 is an apocalyptic number.

90144647 is a deficient number, since it is larger than the sum of its proper divisors (1).

90144647 is an equidigital number, since it uses as much as digits as its factorization.

90144647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 90144647 is about 9494.4534861149. The cubic root of 90144647 is about 448.3804282818.

The spelling of 90144647 in words is "ninety million, one hundred forty-four thousand, six hundred forty-seven".