27891763 has 2 divisors, whose sum is σ = 27891764. Its totient is φ = 27891762.

The previous prime is 27891761. The next prime is 27891793. The reversal of 27891763 is 36719872.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27891763 - 2¹ = 27891761 is a prime.

Together with 27891761, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27891761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13945881 + 13945882.

It is an arithmetic number, because the mean of its divisors is an integer number (13945882).

Almost surely, 2^27891763 is an apocalyptic number.

27891763 is a deficient number, since it is larger than the sum of its proper divisors (1).

27891763 is an equidigital number, since it uses as much as digits as its factorization.

27891763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 27891763 is about 5281.2652840016. The cubic root of 27891763 is about 303.2671165958.

The spelling of 27891763 in words is "twenty-seven million, eight hundred ninety-one thousand, seven hundred sixty-three".