27128623 has 2 divisors, whose sum is σ = 27128624. Its totient is φ = 27128622.

The previous prime is 27128587. The next prime is 27128639. The reversal of 27128623 is 32682172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27128623 - 2²¹ = 25031471 is a prime.

It is a super-2 number, since 2×27128623² = 1471924371752258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27128653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564311 + 13564312.

It is an arithmetic number, because the mean of its divisors is an integer number (13564312).

Almost surely, 2^27128623 is an apocalyptic number.

27128623 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128623 is an equidigital number, since it uses as much as digits as its factorization.

27128623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 27128623 is about 5208.5144715168. The cubic root of 27128623 is about 300.4756270128.

The spelling of 27128623 in words is "twenty-seven million, one hundred twenty-eight thousand, six hundred twenty-three".