27750889 has 2 divisors, whose sum is σ = 27750890. Its totient is φ = 27750888.

The previous prime is 27750787. The next prime is 27750901. The reversal of 27750889 is 98805772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 5736025 = 4692^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 27750889 - 2¹⁷ = 27619817 is a prime.

It is a super-2 number, since 2×27750889² = 1540223680580642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27750589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875444 + 13875445.

It is an arithmetic number, because the mean of its divisors is an integer number (13875445).

Almost surely, 2^27750889 is an apocalyptic number.

It is an amenable number.

27750889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750889 is an equidigital number, since it uses as much as digits as its factorization.

27750889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 27750889 is about 5267.9112558964. The cubic root of 27750889 is about 302.7556802871.

The spelling of 27750889 in words is "twenty-seven million, seven hundred fifty thousand, eight hundred eighty-nine".