27642623 has 2 divisors, whose sum is σ = 27642624. Its totient is φ = 27642622.

The previous prime is 27642617. The next prime is 27642631. The reversal of 27642623 is 32624672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27642623 - 2¹⁶ = 27577087 is a prime.

It is a super-2 number, since 2×27642623² = 1528229212640258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27642623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27642673) 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, 13821311 + 13821312.

It is an arithmetic number, because the mean of its divisors is an integer number (13821312).

Almost surely, 2^27642623 is an apocalyptic number.

27642623 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642623 is an equidigital number, since it uses as much as digits as its factorization.

27642623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 32.

The square root of 27642623 is about 5257.6252243765. The cubic root of 27642623 is about 302.3614482864.

The spelling of 27642623 in words is "twenty-seven million, six hundred forty-two thousand, six hundred twenty-three".