90500687 has 4 divisors (see below), whose sum is σ = 93420096. Its totient is φ = 87581280.

The previous prime is 90500659. The next prime is 90500701. The reversal of 90500687 is 78600509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78600509 = 13 ⋅6046193.

It is a cyclic number.

It is not a de Polignac number, because 90500687 - 2¹⁶ = 90435151 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 (90500887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459658 + ... + 1459719.

It is an arithmetic number, because the mean of its divisors is an integer number (23355024).

Almost surely, 2^90500687 is an apocalyptic number.

90500687 is a deficient number, since it is larger than the sum of its proper divisors (2919409).

90500687 is a wasteful number, since it uses less digits than its factorization.

90500687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919408.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 90500687 is about 9513.1849030701. The cubic root of 90500687 is about 448.9699683784.

The spelling of 90500687 in words is "ninety million, five hundred thousand, six hundred eighty-seven".