14778427 has 2 divisors, whose sum is σ = 14778428. Its totient is φ = 14778426.

The previous prime is 14778403. The next prime is 14778431. The reversal of 14778427 is 72487741.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14778427 - 2²³ = 6389819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14778427.

It is not a weakly prime, because it can be changed into another prime (14778527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7389213 + 7389214.

It is an arithmetic number, because the mean of its divisors is an integer number (7389214).

Almost surely, 2^14778427 is an apocalyptic number.

14778427 is a deficient number, since it is larger than the sum of its proper divisors (1).

14778427 is an equidigital number, since it uses as much as digits as its factorization.

14778427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87808, while the sum is 40.

The square root of 14778427 is about 3844.2719726887. The cubic root of 14778427 is about 245.4008542704.

The spelling of 14778427 in words is "fourteen million, seven hundred seventy-eight thousand, four hundred twenty-seven".