27836989 has 2 divisors, whose sum is σ = 27836990. Its totient is φ = 27836988.

The previous prime is 27836971. The next prime is 27837023. The reversal of 27836989 is 98963872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16728100 + 11108889 = 4090^2 + 3333^2 .

It is a cyclic number.

It is not a de Polignac number, because 27836989 - 2⁹ = 27836477 is a prime.

It is a super-2 number, since 2×27836989² = 1549795913172242, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27836929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13918494 + 13918495.

It is an arithmetic number, because the mean of its divisors is an integer number (13918495).

Almost surely, 2^27836989 is an apocalyptic number.

It is an amenable number.

27836989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27836989 is an equidigital number, since it uses as much as digits as its factorization.

27836989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 27836989 is about 5276.0770464427. The cubic root of 27836989 is about 303.0684672835.

The spelling of 27836989 in words is "twenty-seven million, eight hundred thirty-six thousand, nine hundred eighty-nine".