13878937 has 2 divisors, whose sum is σ = 13878938. Its totient is φ = 13878936.

The previous prime is 13878929. The next prime is 13878967. The reversal of 13878937 is 73987831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 1879641 = 3464^2 + 1371^2 .

It is a cyclic number.

It is not a de Polignac number, because 13878937 - 2³ = 13878929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13878967) 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, 6939468 + 6939469.

It is an arithmetic number, because the mean of its divisors is an integer number (6939469).

Almost surely, 2^13878937 is an apocalyptic number.

It is an amenable number.

13878937 is a deficient number, since it is larger than the sum of its proper divisors (1).

13878937 is an equidigital number, since it uses as much as digits as its factorization.

13878937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 13878937 is about 3725.4445372331. Note that the first 3 decimals coincide. The cubic root of 13878937 is about 240.3175022365.

The spelling of 13878937 in words is "thirteen million, eight hundred seventy-eight thousand, nine hundred thirty-seven".