13678493 has 8 divisors (see below), whose sum is σ = 14102712. Its totient is φ = 13257216.

The previous prime is 13678481. The next prime is 13678507. The reversal of 13678493 is 39487631.

It can be written as a sum of positive squares in 4 ways, for example, as 1968409 + 11710084 = 1403^2 + 3422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13678493 - 2¹⁶ = 13612957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13678493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13678403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11921 + ... + 13017.

It is an arithmetic number, because the mean of its divisors is an integer number (1762839).

Almost surely, 2^13678493 is an apocalyptic number.

It is an amenable number.

13678493 is a deficient number, since it is larger than the sum of its proper divisors (424219).

13678493 is a wasteful number, since it uses less digits than its factorization.

13678493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

The product of its digits is 108864, while the sum is 41.

The square root of 13678493 is about 3698.4446731025. Note that the first 3 decimals coincide. The cubic root of 13678493 is about 239.1549738052.

The spelling of 13678493 in words is "thirteen million, six hundred seventy-eight thousand, four hundred ninety-three".