27878423 has 2 divisors, whose sum is σ = 27878424. Its totient is φ = 27878422.

The previous prime is 27878359. The next prime is 27878429. The reversal of 27878423 is 32487872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27878423 - 2⁶ = 27878359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27878429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13939211 + 13939212.

It is an arithmetic number, because the mean of its divisors is an integer number (13939212).

Almost surely, 2^27878423 is an apocalyptic number.

27878423 is a deficient number, since it is larger than the sum of its proper divisors (1).

27878423 is an equidigital number, since it uses as much as digits as its factorization.

27878423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 41.

The square root of 27878423 is about 5280.0021780299. The cubic root of 27878423 is about 303.2187602827.

The spelling of 27878423 in words is "twenty-seven million, eight hundred seventy-eight thousand, four hundred twenty-three".