27958769 has 2 divisors, whose sum is σ = 27958770. Its totient is φ = 27958768.

The previous prime is 27958759. The next prime is 27958783. The reversal of 27958769 is 96785972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27952369 + 6400 = 5287^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 27958769 - 2⁴ = 27958753 is a prime.

It is a super-2 number, since 2×27958769² = 1563385527990722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27958769.

It is not a weakly prime, because it can be changed into another prime (27958759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13979384 + 13979385.

It is an arithmetic number, because the mean of its divisors is an integer number (13979385).

Almost surely, 2^27958769 is an apocalyptic number.

It is an amenable number.

27958769 is a deficient number, since it is larger than the sum of its proper divisors (1).

27958769 is an equidigital number, since it uses as much as digits as its factorization.

27958769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 27958769 is about 5287.6052235393. The cubic root of 27958769 is about 303.5097744437.

The spelling of 27958769 in words is "twenty-seven million, nine hundred fifty-eight thousand, seven hundred sixty-nine".