27538919 has 2 divisors, whose sum is σ = 27538920. Its totient is φ = 27538918.

The previous prime is 27538897. The next prime is 27538933. The reversal of 27538919 is 91983572.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27538919 is a prime.

It is a super-2 number, since 2×27538919² = 1516784119377122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27538919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27538949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13769459 + 13769460.

It is an arithmetic number, because the mean of its divisors is an integer number (13769460).

Almost surely, 2^27538919 is an apocalyptic number.

27538919 is a deficient number, since it is larger than the sum of its proper divisors (1).

27538919 is an equidigital number, since it uses as much as digits as its factorization.

27538919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 27538919 is about 5247.7537099220. The cubic root of 27538919 is about 301.9828616212.

The spelling of 27538919 in words is "twenty-seven million, five hundred thirty-eight thousand, nine hundred nineteen".