13861937 has 2 divisors, whose sum is σ = 13861938. Its totient is φ = 13861936.

The previous prime is 13861933. The next prime is 13861943. The reversal of 13861937 is 73916831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13830961 + 30976 = 3719^2 + 176^2 .

It is an emirp because it is prime and its reverse (73916831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13861937 - 2² = 13861933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13861937.

It is not a weakly prime, because it can be changed into another prime (13861933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930968 + 6930969.

It is an arithmetic number, because the mean of its divisors is an integer number (6930969).

Almost surely, 2^13861937 is an apocalyptic number.

It is an amenable number.

13861937 is a deficient number, since it is larger than the sum of its proper divisors (1).

13861937 is an equidigital number, since it uses as much as digits as its factorization.

13861937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 13861937 is about 3723.1622312223. The cubic root of 13861937 is about 240.2193423003.

The spelling of 13861937 in words is "thirteen million, eight hundred sixty-one thousand, nine hundred thirty-seven".