27378361 has 2 divisors, whose sum is σ = 27378362. Its totient is φ = 27378360.

The previous prime is 27378359. The next prime is 27378367. The reversal of 27378361 is 16387372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 3171961 = 4920^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 27378361 - 2¹ = 27378359 is a prime.

Together with 27378359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27378361.

It is not a weakly prime, because it can be changed into another prime (27378367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13689180 + 13689181.

It is an arithmetic number, because the mean of its divisors is an integer number (13689181).

Almost surely, 2^27378361 is an apocalyptic number.

It is an amenable number.

27378361 is a deficient number, since it is larger than the sum of its proper divisors (1).

27378361 is an equidigital number, since it uses as much as digits as its factorization.

27378361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 27378361 is about 5232.4335638401. The cubic root of 27378361 is about 301.3948417080.

The spelling of 27378361 in words is "twenty-seven million, three hundred seventy-eight thousand, three hundred sixty-one".