27043967987 has 2 divisors, whose sum is σ = 27043967988. Its totient is φ = 27043967986.

The previous prime is 27043967969. The next prime is 27043968047. The reversal of 27043967987 is 78976934072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27043967987 - 2²⁶ = 26976859123 is a prime.

It is not a weakly prime, because it can be changed into another prime (27043967287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521983993 + 13521983994.

It is an arithmetic number, because the mean of its divisors is an integer number (13521983994).

Almost surely, 2^27043967987 is an apocalyptic number.

27043967987 is a deficient number, since it is larger than the sum of its proper divisors (1).

27043967987 is an equidigital number, since it uses as much as digits as its factorization.

27043967987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 27043967987 in words is "twenty-seven billion, forty-three million, nine hundred sixty-seven thousand, nine hundred eighty-seven".