27990587 has 2 divisors, whose sum is σ = 27990588. Its totient is φ = 27990586.

The previous prime is 27990581. The next prime is 27990601. The reversal of 27990587 is 78509972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27990587 - 2¹⁴ = 27974203 is a prime.

It is not a weakly prime, because it can be changed into another prime (27990581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13995293 + 13995294.

It is an arithmetic number, because the mean of its divisors is an integer number (13995294).

Almost surely, 2^27990587 is an apocalyptic number.

27990587 is a deficient number, since it is larger than the sum of its proper divisors (1).

27990587 is an equidigital number, since it uses as much as digits as its factorization.

27990587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 27990587 is about 5290.6131024674. The cubic root of 27990587 is about 303.6248655023.

The spelling of 27990587 in words is "twenty-seven million, nine hundred ninety thousand, five hundred eighty-seven".