14781397 has 2 divisors, whose sum is σ = 14781398. Its totient is φ = 14781396.

The previous prime is 14781391. The next prime is 14781401. The reversal of 14781397 is 79318741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9790641 + 4990756 = 3129^2 + 2234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14781397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14781391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7390698 + 7390699.

It is an arithmetic number, because the mean of its divisors is an integer number (7390699).

Almost surely, 2^14781397 is an apocalyptic number.

It is an amenable number.

14781397 is a deficient number, since it is larger than the sum of its proper divisors (1).

14781397 is an equidigital number, since it uses as much as digits as its factorization.

14781397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 14781397 is about 3844.6582422889. The cubic root of 14781397 is about 245.4172924592.

The spelling of 14781397 in words is "fourteen million, seven hundred eighty-one thousand, three hundred ninety-seven".