27978383 has 2 divisors, whose sum is σ = 27978384. Its totient is φ = 27978382.

The previous prime is 27978371. The next prime is 27978487. The reversal of 27978383 is 38387972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27978383 - 2⁴ = 27978367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27978343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13989191 + 13989192.

It is an arithmetic number, because the mean of its divisors is an integer number (13989192).

Almost surely, 2^27978383 is an apocalyptic number.

27978383 is a deficient number, since it is larger than the sum of its proper divisors (1).

27978383 is an equidigital number, since it uses as much as digits as its factorization.

27978383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 27978383 is about 5289.4596132308. The cubic root of 27978383 is about 303.5807318975.

The spelling of 27978383 in words is "twenty-seven million, nine hundred seventy-eight thousand, three hundred eighty-three".