27677621 has 2 divisors, whose sum is σ = 27677622. Its totient is φ = 27677620.

The previous prime is 27677609. The next prime is 27677641. The reversal of 27677621 is 12677672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 376996 = 5225^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 27677621 - 2⁶ = 27677557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27677641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13838810 + 13838811.

It is an arithmetic number, because the mean of its divisors is an integer number (13838811).

Almost surely, 2^27677621 is an apocalyptic number.

It is an amenable number.

27677621 is a deficient number, since it is larger than the sum of its proper divisors (1).

27677621 is an equidigital number, since it uses as much as digits as its factorization.

27677621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 27677621 is about 5260.9524803024. The cubic root of 27677621 is about 302.4889998960.

The spelling of 27677621 in words is "twenty-seven million, six hundred seventy-seven thousand, six hundred twenty-one".