27378977 has 2 divisors, whose sum is σ = 27378978. Its totient is φ = 27378976.

The previous prime is 27378941. The next prime is 27378997. The reversal of 27378977 is 77987372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21381376 + 5997601 = 4624^2 + 2449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27378977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27378937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13689488 + 13689489.

It is an arithmetic number, because the mean of its divisors is an integer number (13689489).

Almost surely, 2^27378977 is an apocalyptic number.

It is an amenable number.

27378977 is a deficient number, since it is larger than the sum of its proper divisors (1).

27378977 is an equidigital number, since it uses as much as digits as its factorization.

27378977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1037232, while the sum is 50.

The square root of 27378977 is about 5232.4924271326. The cubic root of 27378977 is about 301.3971021042.

The spelling of 27378977 in words is "twenty-seven million, three hundred seventy-eight thousand, nine hundred seventy-seven".