27997069 has 2 divisors, whose sum is σ = 27997070. Its totient is φ = 27997068.

The previous prime is 27997037. The next prime is 27997087. The reversal of 27997069 is 96079972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19027044 + 8970025 = 4362^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 27997069 - 2⁵ = 27997037 is a prime.

It is a super-2 number, since 2×27997069² = 1567671745181522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27997009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13998534 + 13998535.

It is an arithmetic number, because the mean of its divisors is an integer number (13998535).

Almost surely, 2^27997069 is an apocalyptic number.

It is an amenable number.

27997069 is a deficient number, since it is larger than the sum of its proper divisors (1).

27997069 is an equidigital number, since it uses as much as digits as its factorization.

27997069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 27997069 is about 5291.2256614134. The cubic root of 27997069 is about 303.6483012913.

The spelling of 27997069 in words is "twenty-seven million, nine hundred ninety-seven thousand, sixty-nine".