90609587 has 4 divisors (see below), whose sum is σ = 90666576. Its totient is φ = 90552600.

The previous prime is 90609577. The next prime is 90609599. The reversal of 90609587 is 78590609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90609587 - 2⁸ = 90609331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90609577) 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, 26039 + ... + 29312.

It is an arithmetic number, because the mean of its divisors is an integer number (22666644).

Almost surely, 2^90609587 is an apocalyptic number.

90609587 is a deficient number, since it is larger than the sum of its proper divisors (56989).

90609587 is a wasteful number, since it uses less digits than its factorization.

90609587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56988.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 90609587 is about 9518.9068174870. The cubic root of 90609587 is about 449.1499789149.

The spelling of 90609587 in words is "ninety million, six hundred nine thousand, five hundred eighty-seven".