27788479 has 2 divisors, whose sum is σ = 27788480. Its totient is φ = 27788478.

The previous prime is 27788441. The next prime is 27788491. The reversal of 27788479 is 97488772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27788479 - 2⁹ = 27787967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27788419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13894239 + 13894240.

It is an arithmetic number, because the mean of its divisors is an integer number (13894240).

Almost surely, 2^27788479 is an apocalyptic number.

27788479 is a deficient number, since it is larger than the sum of its proper divisors (1).

27788479 is an equidigital number, since it uses as much as digits as its factorization.

27788479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 52.

The square root of 27788479 is about 5271.4778762696. The cubic root of 27788479 is about 302.8923179681.

The spelling of 27788479 in words is "twenty-seven million, seven hundred eighty-eight thousand, four hundred seventy-nine".