13491678 has 16 divisors (see below), whose sum is σ = 27025920. Its totient is φ = 4490136.

The previous prime is 13491677. The next prime is 13491689. The reversal of 13491678 is 87619431.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3603 + ... + 6321.

It is an arithmetic number, because the mean of its divisors is an integer number (1689120).

Almost surely, 2^13491678 is an apocalyptic number.

13491678 is an abundant number, since it is smaller than the sum of its proper divisors (13534242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13491678 is a wasteful number, since it uses less digits than its factorization.

13491678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551.

The product of its digits is 36288, while the sum is 39.

The square root of 13491678 is about 3673.1019588353. The cubic root of 13491678 is about 238.0612205102.

It can be divided in two parts, 1349 and 1678, that multiplied together give a palindrome (2263622).

The spelling of 13491678 in words is "thirteen million, four hundred ninety-one thousand, six hundred seventy-eight".