13840087 has 2 divisors, whose sum is σ = 13840088. Its totient is φ = 13840086.

The previous prime is 13840081. The next prime is 13840111. The reversal of 13840087 is 78004831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13840087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13840081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6920043 + 6920044.

It is an arithmetic number, because the mean of its divisors is an integer number (6920044).

Almost surely, 2^13840087 is an apocalyptic number.

13840087 is a deficient number, since it is larger than the sum of its proper divisors (1).

13840087 is an equidigital number, since it uses as much as digits as its factorization.

13840087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 13840087 is about 3720.2267404017. The cubic root of 13840087 is about 240.0930599762.

The spelling of 13840087 in words is "thirteen million, eight hundred forty thousand, eighty-seven".