27042989 has 2 divisors, whose sum is σ = 27042990. Its totient is φ = 27042988.

The previous prime is 27042979. The next prime is 27042997. The reversal of 27042989 is 98924072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 8076964 = 4355^2 + 2842^2 .

It is a cyclic number.

It is not a de Polignac number, because 27042989 - 2⁴ = 27042973 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 (27042949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521494 + 13521495.

It is an arithmetic number, because the mean of its divisors is an integer number (13521495).

Almost surely, 2^27042989 is an apocalyptic number.

It is an amenable number.

27042989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27042989 is an equidigital number, since it uses as much as digits as its factorization.

27042989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 27042989 is about 5200.2873959042. The cubic root of 27042989 is about 300.1591340914.

The spelling of 27042989 in words is "twenty-seven million, forty-two thousand, nine hundred eighty-nine".