13678917 has 16 divisors (see below), whose sum is σ = 21941760. Its totient is φ = 7404912.

The previous prime is 13678909. The next prime is 13678933. The reversal of 13678917 is 71987631.

It is not a de Polignac number, because 13678917 - 2³ = 13678909 is a prime.

It is a super-2 number, since 2×13678917² = 374225540585778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13678957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16743 + ... + 17540.

It is an arithmetic number, because the mean of its divisors is an integer number (1371360).

Almost surely, 2^13678917 is an apocalyptic number.

It is an amenable number.

13678917 is a deficient number, since it is larger than the sum of its proper divisors (8262843).

13678917 is a wasteful number, since it uses less digits than its factorization.

13678917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34312.

The product of its digits is 63504, while the sum is 42.

The square root of 13678917 is about 3698.5019940511. The cubic root of 13678917 is about 239.1574448537.

The spelling of 13678917 in words is "thirteen million, six hundred seventy-eight thousand, nine hundred seventeen".