27964109 has 2 divisors, whose sum is σ = 27964110. Its totient is φ = 27964108.

The previous prime is 27964103. The next prime is 27964121. The reversal of 27964109 is 90146972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26234884 + 1729225 = 5122^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 27964109 - 2⁸ = 27963853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27964103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13982054 + 13982055.

It is an arithmetic number, because the mean of its divisors is an integer number (13982055).

Almost surely, 2^27964109 is an apocalyptic number.

It is an amenable number.

27964109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964109 is an equidigital number, since it uses as much as digits as its factorization.

27964109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 27964109 is about 5288.1101539208. The cubic root of 27964109 is about 303.5290962174.

The spelling of 27964109 in words is "twenty-seven million, nine hundred sixty-four thousand, one hundred nine".