14991871 has 2 divisors, whose sum is σ = 14991872. Its totient is φ = 14991870.

The previous prime is 14991859. The next prime is 14991901. The reversal of 14991871 is 17819941.

It is a weak prime.

It is an emirp because it is prime and its reverse (17819941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14991871 - 2¹⁷ = 14860799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14991271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7495935 + 7495936.

It is an arithmetic number, because the mean of its divisors is an integer number (7495936).

Almost surely, 2^14991871 is an apocalyptic number.

14991871 is a deficient number, since it is larger than the sum of its proper divisors (1).

14991871 is an equidigital number, since it uses as much as digits as its factorization.

14991871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 40.

The square root of 14991871 is about 3871.9337545986. The cubic root of 14991871 is about 246.5766486318.

The spelling of 14991871 in words is "fourteen million, nine hundred ninety-one thousand, eight hundred seventy-one".