90284587 has 4 divisors (see below), whose sum is σ = 90494496. Its totient is φ = 90074680.

The previous prime is 90284581. The next prime is 90284609. The reversal of 90284587 is 78548209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78548209 = 8117 ⋅9677.

It is a cyclic number.

It is not a de Polignac number, because 90284587 - 2⁷ = 90284459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90284581) 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, 104308 + ... + 105169.

It is an arithmetic number, because the mean of its divisors is an integer number (22623624).

Almost surely, 2^90284587 is an apocalyptic number.

90284587 is a deficient number, since it is larger than the sum of its proper divisors (209909).

90284587 is a wasteful number, since it uses less digits than its factorization.

90284587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209908.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 90284587 is about 9501.8201940470. The cubic root of 90284587 is about 448.6123293363.

The spelling of 90284587 in words is "ninety million, two hundred eighty-four thousand, five hundred eighty-seven".