90688502 has 4 divisors (see below), whose sum is σ = 136032756. Its totient is φ = 45344250.

The previous prime is 90688483. The next prime is 90688529. The reversal of 90688502 is 20588609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20588609 = 19 ⋅1083611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22672124 + ... + 22672127.

It is an arithmetic number, because the mean of its divisors is an integer number (34008189).

Almost surely, 2^90688502 is an apocalyptic number.

90688502 is a deficient number, since it is larger than the sum of its proper divisors (45344254).

90688502 is a wasteful number, since it uses less digits than its factorization.

90688502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45344253.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 90688502 is about 9523.0510867054. The cubic root of 90688502 is about 449.2803344572.

The spelling of 90688502 in words is "ninety million, six hundred eighty-eight thousand, five hundred two".