27993011 has 2 divisors, whose sum is σ = 27993012. Its totient is φ = 27993010.

The previous prime is 27992989. The next prime is 27993013. The reversal of 27993011 is 11039972.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27993011 - 2¹⁰ = 27991987 is a prime.

It is a super-2 number, since 2×27993011² = 1567217329692242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 27993013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27993013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13996505 + 13996506.

It is an arithmetic number, because the mean of its divisors is an integer number (13996506).

Almost surely, 2^27993011 is an apocalyptic number.

27993011 is a deficient number, since it is larger than the sum of its proper divisors (1).

27993011 is an equidigital number, since it uses as much as digits as its factorization.

27993011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 27993011 is about 5290.8421824885. The cubic root of 27993011 is about 303.6336299419.

The spelling of 27993011 in words is "twenty-seven million, nine hundred ninety-three thousand, eleven".