27690863 has 2 divisors, whose sum is σ = 27690864. Its totient is φ = 27690862.

The previous prime is 27690821. The next prime is 27690893. The reversal of 27690863 is 36809672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27690863 - 2¹⁰ = 27689839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27690863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27690893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13845431 + 13845432.

It is an arithmetic number, because the mean of its divisors is an integer number (13845432).

Almost surely, 2^27690863 is an apocalyptic number.

27690863 is a deficient number, since it is larger than the sum of its proper divisors (1).

27690863 is an equidigital number, since it uses as much as digits as its factorization.

27690863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 27690863 is about 5262.2108471630. The cubic root of 27690863 is about 302.5372328553.

The spelling of 27690863 in words is "twenty-seven million, six hundred ninety thousand, eight hundred sixty-three".