27945451 has 2 divisors, whose sum is σ = 27945452. Its totient is φ = 27945450.

The previous prime is 27945443. The next prime is 27945457. The reversal of 27945451 is 15454972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27945451 - 2³ = 27945443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27945451.

It is not a weakly prime, because it can be changed into another prime (27945457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13972725 + 13972726.

It is an arithmetic number, because the mean of its divisors is an integer number (13972726).

Almost surely, 2^27945451 is an apocalyptic number.

27945451 is a deficient number, since it is larger than the sum of its proper divisors (1).

27945451 is an equidigital number, since it uses as much as digits as its factorization.

27945451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 27945451 is about 5286.3457132503. The cubic root of 27945451 is about 303.4615750736.

The spelling of 27945451 in words is "twenty-seven million, nine hundred forty-five thousand, four hundred fifty-one".