27493643 has 2 divisors, whose sum is σ = 27493644. Its totient is φ = 27493642.

The previous prime is 27493633. The next prime is 27493673. The reversal of 27493643 is 34639472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27493643 - 2⁸ = 27493387 is a prime.

It is a super-2 number, since 2×27493643² = 1511800810822898, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27493597 and 27493606.

It is not a weakly prime, because it can be changed into another prime (27493633) 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, 13746821 + 13746822.

It is an arithmetic number, because the mean of its divisors is an integer number (13746822).

Almost surely, 2^27493643 is an apocalyptic number.

27493643 is a deficient number, since it is larger than the sum of its proper divisors (1).

27493643 is an equidigital number, since it uses as much as digits as its factorization.

27493643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 38.

The square root of 27493643 is about 5243.4380896507. The cubic root of 27493643 is about 301.8172768621.

The spelling of 27493643 in words is "twenty-seven million, four hundred ninety-three thousand, six hundred forty-three".