13870917 has 12 divisors (see below), whose sum is σ = 20262060. Its totient is φ = 9142848.

The previous prime is 13870891. The next prime is 13870921. The reversal of 13870917 is 71907831.

It can be written as a sum of positive squares in 2 ways, for example, as 7322436 + 6548481 = 2706^2 + 2559^2 .

It is not a de Polignac number, because 13870917 - 2¹² = 13866821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870937) 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 in 11 ways as a sum of consecutive naturals, for example, 7858 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (1688505).

Almost surely, 2^13870917 is an apocalyptic number.

It is an amenable number.

13870917 is a deficient number, since it is larger than the sum of its proper divisors (6391143).

13870917 is a wasteful number, since it uses less digits than its factorization.

13870917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17412 (or 17409 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 13870917 is about 3724.3680000773. The cubic root of 13870917 is about 240.2712038366.

The spelling of 13870917 in words is "thirteen million, eight hundred seventy thousand, nine hundred seventeen".