27043691 has 2 divisors, whose sum is σ = 27043692. Its totient is φ = 27043690.

The previous prime is 27043637. The next prime is 27043703. The reversal of 27043691 is 19634072.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27043691 - 2¹⁴ = 27027307 is a prime.

It is a super-2 number, since 2×27043691² = 1462722445806962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27040691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521845 + 13521846.

It is an arithmetic number, because the mean of its divisors is an integer number (13521846).

Almost surely, 2^27043691 is an apocalyptic number.

27043691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27043691 is an equidigital number, since it uses as much as digits as its factorization.

27043691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 27043691 is about 5200.3548917358. The cubic root of 27043691 is about 300.1617313128.

The spelling of 27043691 in words is "twenty-seven million, forty-three thousand, six hundred ninety-one".