27678089 has 2 divisors, whose sum is σ = 27678090. Its totient is φ = 27678088.

The previous prime is 27678061. The next prime is 27678103. The reversal of 27678089 is 98087672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25452025 + 2226064 = 5045^2 + 1492^2 .

It is a cyclic number.

It is not a de Polignac number, because 27678089 - 2⁸ = 27677833 is a prime.

It is a super-2 number, since 2×27678089² = 1532153221383842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27678019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13839044 + 13839045.

It is an arithmetic number, because the mean of its divisors is an integer number (13839045).

Almost surely, 2^27678089 is an apocalyptic number.

It is an amenable number.

27678089 is a deficient number, since it is larger than the sum of its proper divisors (1).

27678089 is an equidigital number, since it uses as much as digits as its factorization.

27678089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 27678089 is about 5260.9969587522. The cubic root of 27678089 is about 302.4907048119.

The spelling of 27678089 in words is "twenty-seven million, six hundred seventy-eight thousand, eighty-nine".