90897759 has 12 divisors (see below), whose sum is σ = 139020336. Its totient is φ = 57033792.

The previous prime is 90897749. The next prime is 90897787. The reversal of 90897759 is 95779809.

It is not a de Polignac number, because 90897759 - 2¹⁶ = 90832223 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897749) 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 in 11 ways as a sum of consecutive naturals, for example, 296899 + ... + 297204.

It is an arithmetic number, because the mean of its divisors is an integer number (11585028).

Almost surely, 2^90897759 is an apocalyptic number.

90897759 is a deficient number, since it is larger than the sum of its proper divisors (48122577).

90897759 is a wasteful number, since it uses less digits than its factorization.

90897759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594126 (or 594123 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 54.

The square root of 90897759 is about 9534.0316236102. The cubic root of 90897759 is about 449.6256293752.

The spelling of 90897759 in words is "ninety million, eight hundred ninety-seven thousand, seven hundred fifty-nine".