13840237 has 2 divisors, whose sum is σ = 13840238. Its totient is φ = 13840236.

The previous prime is 13840217. The next prime is 13840249. The reversal of 13840237 is 73204831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 1771561 = 3474^2 + 1331^2 .

It is a cyclic number.

It is not a de Polignac number, because 13840237 - 2¹¹ = 13838189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13840217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6920118 + 6920119.

It is an arithmetic number, because the mean of its divisors is an integer number (6920119).

Almost surely, 2^13840237 is an apocalyptic number.

It is an amenable number.

13840237 is a deficient number, since it is larger than the sum of its proper divisors (1).

13840237 is an equidigital number, since it uses as much as digits as its factorization.

13840237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 13840237 is about 3720.2469004086. The cubic root of 13840237 is about 240.0939273558.

The spelling of 13840237 in words is "thirteen million, eight hundred forty thousand, two hundred thirty-seven".