27406427 has 2 divisors, whose sum is σ = 27406428. Its totient is φ = 27406426.

The previous prime is 27406411. The next prime is 27406433. The reversal of 27406427 is 72460472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27406427 - 2⁴ = 27406411 is a prime.

It is a super-2 number, since 2×27406427² = 1502224481812658, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1706765 and since 27406427 and 1706765 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 27406393 and 27406402.

It is not a weakly prime, because it can be changed into another prime (27406447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13703213 + 13703214.

It is an arithmetic number, because the mean of its divisors is an integer number (13703214).

Almost surely, 2^27406427 is an apocalyptic number.

27406427 is a deficient number, since it is larger than the sum of its proper divisors (1).

27406427 is an equidigital number, since it uses as much as digits as its factorization.

27406427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 27406427 is about 5235.1148029437. The cubic root of 27406427 is about 301.4977947763.

Adding to 27406427 its reverse (72460472), we get a palindrome (99866899).

The spelling of 27406427 in words is "twenty-seven million, four hundred six thousand, four hundred twenty-seven".