13731287 has 2 divisors, whose sum is σ = 13731288. Its totient is φ = 13731286.

The previous prime is 13731259. The next prime is 13731301. The reversal of 13731287 is 78213731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13731287 - 2⁸ = 13731031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13731217) 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, 6865643 + 6865644.

It is an arithmetic number, because the mean of its divisors is an integer number (6865644).

Almost surely, 2^13731287 is an apocalyptic number.

13731287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13731287 is an equidigital number, since it uses as much as digits as its factorization.

13731287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 13731287 is about 3705.5751240529. The cubic root of 13731287 is about 239.4622624949.

The spelling of 13731287 in words is "thirteen million, seven hundred thirty-one thousand, two hundred eighty-seven".