27897464923 has 2 divisors, whose sum is σ = 27897464924. Its totient is φ = 27897464922.

The previous prime is 27897464849. The next prime is 27897464929. The reversal of 27897464923 is 32946479872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27897464923 - 2⁹ = 27897464411 is a prime.

It is not a weakly prime, because it can be changed into another prime (27897464929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13948732461 + 13948732462.

It is an arithmetic number, because the mean of its divisors is an integer number (13948732462).

Almost surely, 2^27897464923 is an apocalyptic number.

27897464923 is a deficient number, since it is larger than the sum of its proper divisors (1).

27897464923 is an equidigital number, since it uses as much as digits as its factorization.

27897464923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 61.

The spelling of 27897464923 in words is "twenty-seven billion, eight hundred ninety-seven million, four hundred sixty-four thousand, nine hundred twenty-three".