27913916609 has 2 divisors, whose sum is σ = 27913916610. Its totient is φ = 27913916608.

The previous prime is 27913916543. The next prime is 27913916659. The reversal of 27913916609 is 90661931972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27333347584 + 580569025 = 165328^2 + 24095^2 .

It is a cyclic number.

It is not a de Polignac number, because 27913916609 - 2⁸ = 27913916353 is a prime.

It is a super-3 number, since 3×27913916609³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27913916659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13956958304 + 13956958305.

It is an arithmetic number, because the mean of its divisors is an integer number (13956958305).

Almost surely, 2^27913916609 is an apocalyptic number.

It is an amenable number.

27913916609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27913916609 is an equidigital number, since it uses as much as digits as its factorization.

27913916609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 27913916609 in words is "twenty-seven billion, nine hundred thirteen million, nine hundred sixteen thousand, six hundred nine".