90586491 has 4 divisors (see below), whose sum is σ = 120781992. Its totient is φ = 60390992.

The previous prime is 90586481. The next prime is 90586499. The reversal of 90586491 is 19468509.

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 90586491 - 2²¹ = 88489339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90586499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15097746 + ... + 15097751.

It is an arithmetic number, because the mean of its divisors is an integer number (30195498).

Almost surely, 2^90586491 is an apocalyptic number.

90586491 is a deficient number, since it is larger than the sum of its proper divisors (30195501).

90586491 is a wasteful number, since it uses less digits than its factorization.

90586491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30195500.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 90586491 is about 9517.6935756516. The cubic root of 90586491 is about 449.1118135294. Note that the first 3 decimals are identical.

The spelling of 90586491 in words is "ninety million, five hundred eighty-six thousand, four hundred ninety-one".