13956287 has 4 divisors (see below), whose sum is σ = 13964040. Its totient is φ = 13948536.

The previous prime is 13956247. The next prime is 13956311. The reversal of 13956287 is 78265931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78265931 = 467 ⋅167593.

It is a cyclic number.

It is not a de Polignac number, because 13956287 - 2²⁰ = 12907711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13956247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389 + ... + 5297.

It is an arithmetic number, because the mean of its divisors is an integer number (3491010).

Almost surely, 2^13956287 is an apocalyptic number.

13956287 is a deficient number, since it is larger than the sum of its proper divisors (7753).

13956287 is an equidigital number, since it uses as much as digits as its factorization.

13956287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752.

The product of its digits is 90720, while the sum is 41.

The square root of 13956287 is about 3735.8114245770. The cubic root of 13956287 is about 240.7631207249.

The spelling of 13956287 in words is "thirteen million, nine hundred fifty-six thousand, two hundred eighty-seven".