27321971 has 2 divisors, whose sum is σ = 27321972. Its totient is φ = 27321970.

The previous prime is 27321967. The next prime is 27321989. The reversal of 27321971 is 17912372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27321971 - 2² = 27321967 is a prime.

It is not a weakly prime, because it can be changed into another prime (27321991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13660985 + 13660986.

It is an arithmetic number, because the mean of its divisors is an integer number (13660986).

Almost surely, 2^27321971 is an apocalyptic number.

27321971 is a deficient number, since it is larger than the sum of its proper divisors (1).

27321971 is an equidigital number, since it uses as much as digits as its factorization.

27321971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 27321971 is about 5227.0422802958. The cubic root of 27321971 is about 301.1877762705.

The spelling of 27321971 in words is "twenty-seven million, three hundred twenty-one thousand, nine hundred seventy-one".