90688549 has 8 divisors (see below), whose sum is σ = 104436288. Its totient is φ = 77138880.

The previous prime is 90688537. The next prime is 90688553. The reversal of 90688549 is 94588609.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-90688549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90688529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48532 + ... + 50365.

It is an arithmetic number, because the mean of its divisors is an integer number (13054536).

Almost surely, 2^90688549 is an apocalyptic number.

It is an amenable number.

90688549 is a deficient number, since it is larger than the sum of its proper divisors (13747739).

90688549 is a wasteful number, since it uses less digits than its factorization.

90688549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99035.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 90688549 is about 9523.0535544016. The cubic root of 90688549 is about 449.2804120715.

The spelling of 90688549 in words is "ninety million, six hundred eighty-eight thousand, five hundred forty-nine".