27043987 has 2 divisors, whose sum is σ = 27043988. Its totient is φ = 27043986.

The previous prime is 27043967. The next prime is 27043993. The reversal of 27043987 is 78934072.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27043987 - 2¹⁹ = 26519699 is a prime.

It is not a weakly prime, because it can be changed into another prime (27043967) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521993 + 13521994.

It is an arithmetic number, because the mean of its divisors is an integer number (13521994).

Almost surely, 2^27043987 is an apocalyptic number.

27043987 is a deficient number, since it is larger than the sum of its proper divisors (1).

27043987 is an equidigital number, since it uses as much as digits as its factorization.

27043987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 27043987 is about 5200.3833512540. The cubic root of 27043987 is about 300.1628264240.

The spelling of 27043987 in words is "twenty-seven million, forty-three thousand, nine hundred eighty-seven".