27990601 has 2 divisors, whose sum is σ = 27990602. Its totient is φ = 27990600.

The previous prime is 27990587. The next prime is 27990617. The reversal of 27990601 is 10609972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21864976 + 6125625 = 4676^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 27990601 - 2⁹ = 27990089 is a prime.

It is not a weakly prime, because it can be changed into another prime (27990631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13995300 + 13995301.

It is an arithmetic number, because the mean of its divisors is an integer number (13995301).

Almost surely, 2^27990601 is an apocalyptic number.

It is an amenable number.

27990601 is a deficient number, since it is larger than the sum of its proper divisors (1).

27990601 is an equidigital number, since it uses as much as digits as its factorization.

27990601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 27990601 is about 5290.6144255653. The cubic root of 27990601 is about 303.6249161234.

The spelling of 27990601 in words is "twenty-seven million, nine hundred ninety thousand, six hundred one".