27198643 has 2 divisors, whose sum is σ = 27198644. Its totient is φ = 27198642.

The previous prime is 27198631. The next prime is 27198653. The reversal of 27198643 is 34689172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27198643 - 2¹³ = 27190451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27198596 and 27198605.

It is not a weakly prime, because it can be changed into another prime (27198653) 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, 13599321 + 13599322.

It is an arithmetic number, because the mean of its divisors is an integer number (13599322).

Almost surely, 2^27198643 is an apocalyptic number.

27198643 is a deficient number, since it is larger than the sum of its proper divisors (1).

27198643 is an equidigital number, since it uses as much as digits as its factorization.

27198643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 27198643 is about 5215.2318261032. The cubic root of 27198643 is about 300.7339178991.

The spelling of 27198643 in words is "twenty-seven million, one hundred ninety-eight thousand, six hundred forty-three".