27468781 has 2 divisors, whose sum is σ = 27468782. Its totient is φ = 27468780.

The previous prime is 27468733. The next prime is 27468797. The reversal of 27468781 is 18786472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14182756 + 13286025 = 3766^2 + 3645^2 .

It is a cyclic number.

It is not a de Polignac number, because 27468781 - 2⁷ = 27468653 is a prime.

It is a super-2 number, since 2×27468781² = 1509067859251922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27469781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13734390 + 13734391.

It is an arithmetic number, because the mean of its divisors is an integer number (13734391).

Almost surely, 2^27468781 is an apocalyptic number.

It is an amenable number.

27468781 is a deficient number, since it is larger than the sum of its proper divisors (1).

27468781 is an equidigital number, since it uses as much as digits as its factorization.

27468781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 43.

The square root of 27468781 is about 5241.0667807232. The cubic root of 27468781 is about 301.7262734725.

The spelling of 27468781 in words is "twenty-seven million, four hundred sixty-eight thousand, seven hundred eighty-one".