27391123 has 2 divisors, whose sum is σ = 27391124. Its totient is φ = 27391122.

The previous prime is 27391081. The next prime is 27391127. The reversal of 27391123 is 32119372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27391123 - 2⁹ = 27390611 is a prime.

It is a super-2 number, since 2×27391123² = 1500547238402258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27391091 and 27391100.

It is not a weakly prime, because it can be changed into another prime (27391127) 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, 13695561 + 13695562.

It is an arithmetic number, because the mean of its divisors is an integer number (13695562).

Almost surely, 2^27391123 is an apocalyptic number.

27391123 is a deficient number, since it is larger than the sum of its proper divisors (1).

27391123 is an equidigital number, since it uses as much as digits as its factorization.

27391123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 27391123 is about 5233.6529307932. The cubic root of 27391123 is about 301.4416646166.

The spelling of 27391123 in words is "twenty-seven million, three hundred ninety-one thousand, one hundred twenty-three".