13917643 has 4 divisors (see below), whose sum is σ = 14011200. Its totient is φ = 13824088.

The previous prime is 13917637. The next prime is 13917703. The reversal of 13917643 is 34671931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34671931 = 7 ⋅4953133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13917643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13917599 and 13917608.

It is not an unprimeable number, because it can be changed into a prime (13912643) 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, 46555 + ... + 46852.

It is an arithmetic number, because the mean of its divisors is an integer number (3502800).

Almost surely, 2^13917643 is an apocalyptic number.

13917643 is a deficient number, since it is larger than the sum of its proper divisors (93557).

13917643 is an equidigital number, since it uses as much as digits as its factorization.

13917643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93556.

The product of its digits is 13608, while the sum is 34.

The square root of 13917643 is about 3730.6357367076. The cubic root of 13917643 is about 240.5406964584.

The spelling of 13917643 in words is "thirteen million, nine hundred seventeen thousand, six hundred forty-three".