27909774227 has 2 divisors, whose sum is σ = 27909774228. Its totient is φ = 27909774226.

The previous prime is 27909774209. The next prime is 27909774271. The reversal of 27909774227 is 72247790972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27909774227 - 2⁶ = 27909774163 is a prime.

It is a super-2 number, since 2×27909774227² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27909774727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13954887113 + 13954887114.

It is an arithmetic number, because the mean of its divisors is an integer number (13954887114).

Almost surely, 2^27909774227 is an apocalyptic number.

27909774227 is a deficient number, since it is larger than the sum of its proper divisors (1).

27909774227 is an equidigital number, since it uses as much as digits as its factorization.

27909774227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6223392, while the sum is 56.

The spelling of 27909774227 in words is "twenty-seven billion, nine hundred nine million, seven hundred seventy-four thousand, two hundred twenty-seven".