13981937 has 2 divisors, whose sum is σ = 13981938. Its totient is φ = 13981936.

The previous prime is 13981927. The next prime is 13981951. The reversal of 13981937 is 73918931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11262736 + 2719201 = 3356^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981937 - 2⁴ = 13981921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13981894 and 13981903.

It is not a weakly prime, because it can be changed into another prime (13981927) 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, 6990968 + 6990969.

It is an arithmetic number, because the mean of its divisors is an integer number (6990969).

Almost surely, 2^13981937 is an apocalyptic number.

It is an amenable number.

13981937 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981937 is an equidigital number, since it uses as much as digits as its factorization.

13981937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 13981937 is about 3739.2428377948. The cubic root of 13981937 is about 240.9105284745.

The spelling of 13981937 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred thirty-seven".