27918983 has 2 divisors, whose sum is σ = 27918984. Its totient is φ = 27918982.

The previous prime is 27918973. The next prime is 27919007. The reversal of 27918983 is 38981972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27918983 - 2¹⁶ = 27853447 is a prime.

It is a super-2 number, since 2×27918983² = 1558939223508578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27918973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13959491 + 13959492.

It is an arithmetic number, because the mean of its divisors is an integer number (13959492).

Almost surely, 2^27918983 is an apocalyptic number.

27918983 is a deficient number, since it is larger than the sum of its proper divisors (1).

27918983 is an equidigital number, since it uses as much as digits as its factorization.

27918983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 27918983 is about 5283.8416895286. The cubic root of 27918983 is about 303.3657388664.

The spelling of 27918983 in words is "twenty-seven million, nine hundred eighteen thousand, nine hundred eighty-three".