27972727 has 2 divisors, whose sum is σ = 27972728. Its totient is φ = 27972726.

The previous prime is 27972713. The next prime is 27972739. The reversal of 27972727 is 72727972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27972727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27972767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13986363 + 13986364.

It is an arithmetic number, because the mean of its divisors is an integer number (13986364).

Almost surely, 2^27972727 is an apocalyptic number.

27972727 is a deficient number, since it is larger than the sum of its proper divisors (1).

27972727 is an equidigital number, since it uses as much as digits as its factorization.

27972727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172872, while the sum is 43.

The square root of 27972727 is about 5288.9249380191. The cubic root of 27972727 is about 303.5602736227.

The spelling of 27972727 in words is "twenty-seven million, nine hundred seventy-two thousand, seven hundred twenty-seven".