27981467 has 2 divisors, whose sum is σ = 27981468. Its totient is φ = 27981466.

The previous prime is 27981461. The next prime is 27981487. The reversal of 27981467 is 76418972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27981467 - 2⁸ = 27981211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27981461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13990733 + 13990734.

It is an arithmetic number, because the mean of its divisors is an integer number (13990734).

Almost surely, 2^27981467 is an apocalyptic number.

27981467 is a deficient number, since it is larger than the sum of its proper divisors (1).

27981467 is an equidigital number, since it uses as much as digits as its factorization.

27981467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 27981467 is about 5289.7511283613. The cubic root of 27981467 is about 303.5918858489.

The spelling of 27981467 in words is "twenty-seven million, nine hundred eighty-one thousand, four hundred sixty-seven".