27897907 has 2 divisors, whose sum is σ = 27897908. Its totient is φ = 27897906.

The previous prime is 27897887. The next prime is 27897911. The reversal of 27897907 is 70979872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27897907 - 2¹⁵ = 27865139 is a prime.

It is not a weakly prime, because it can be changed into another prime (27897967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13948953 + 13948954.

It is an arithmetic number, because the mean of its divisors is an integer number (13948954).

Almost surely, 2^27897907 is an apocalyptic number.

27897907 is a deficient number, since it is larger than the sum of its proper divisors (1).

27897907 is an equidigital number, since it uses as much as digits as its factorization.

27897907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 27897907 is about 5281.8469307620. The cubic root of 27897907 is about 303.2893828633.

The spelling of 27897907 in words is "twenty-seven million, eight hundred ninety-seven thousand, nine hundred seven".