27381769 has 2 divisors, whose sum is σ = 27381770. Its totient is φ = 27381768.

The previous prime is 27381763. The next prime is 27381787. The reversal of 27381769 is 96718372.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 4149369 = 4820^2 + 2037^2 .

It is a cyclic number.

It is not a de Polignac number, because 27381769 - 2⁵ = 27381737 is a prime.

It is a super-2 number, since 2×27381769² = 1499522547138722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27381763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13690884 + 13690885.

It is an arithmetic number, because the mean of its divisors is an integer number (13690885).

Almost surely, 2^27381769 is an apocalyptic number.

It is an amenable number.

27381769 is a deficient number, since it is larger than the sum of its proper divisors (1).

27381769 is an equidigital number, since it uses as much as digits as its factorization.

27381769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 27381769 is about 5232.7592147929. The cubic root of 27381769 is about 301.4073468516.

The spelling of 27381769 in words is "twenty-seven million, three hundred eighty-one thousand, seven hundred sixty-nine".