90689571 has 16 divisors (see below), whose sum is σ = 153548800. Its totient is φ = 51822504.

The previous prime is 90689569. The next prime is 90689609. The reversal of 90689571 is 17598609.

It is not a de Polignac number, because 90689571 - 2¹ = 90689569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90689531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239731 + ... + 240108.

It is an arithmetic number, because the mean of its divisors is an integer number (9596800).

Almost surely, 2^90689571 is an apocalyptic number.

90689571 is a deficient number, since it is larger than the sum of its proper divisors (62859229).

90689571 is a wasteful number, since it uses less digits than its factorization.

90689571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479855 (or 479849 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 90689571 is about 9523.1072135097. The cubic root of 90689571 is about 449.2820997629.

The spelling of 90689571 in words is "ninety million, six hundred eighty-nine thousand, five hundred seventy-one".