27378997 has 2 divisors, whose sum is σ = 27378998. Its totient is φ = 27378996.

The previous prime is 27378977. The next prime is 27379013. The reversal of 27378997 is 79987372.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 7612081 = 4446^2 + 2759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27378997 is a prime.

It is a congruent number.

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, 13689498 + 13689499.

It is an arithmetic number, because the mean of its divisors is an integer number (13689499).

Almost surely, 2^27378997 is an apocalyptic number.

It is an amenable number.

27378997 is a deficient number, since it is larger than the sum of its proper divisors (1).

27378997 is an equidigital number, since it uses as much as digits as its factorization.

27378997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 27378997 is about 5232.4943382674. The cubic root of 27378997 is about 301.3971754932.

The spelling of 27378997 in words is "twenty-seven million, three hundred seventy-eight thousand, nine hundred ninety-seven".