27772391 has 2 divisors, whose sum is σ = 27772392. Its totient is φ = 27772390.

The previous prime is 27772369. The next prime is 27772399. The reversal of 27772391 is 19327772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27772391 - 2¹⁸ = 27510247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27772399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13886195 + 13886196.

It is an arithmetic number, because the mean of its divisors is an integer number (13886196).

Almost surely, 2^27772391 is an apocalyptic number.

27772391 is a deficient number, since it is larger than the sum of its proper divisors (1).

27772391 is an equidigital number, since it uses as much as digits as its factorization.

27772391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 38.

The square root of 27772391 is about 5269.9517075586. The cubic root of 27772391 is about 302.8338540234.

The spelling of 27772391 in words is "twenty-seven million, seven hundred seventy-two thousand, three hundred ninety-one".