13419891 has 16 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 8911944.

The previous prime is 13419881. The next prime is 13419893. The reversal of 13419891 is 19891431.

It is not a de Polignac number, because 13419891 - 2⁹ = 13419379 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13419893) 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 15 ways as a sum of consecutive naturals, for example, 7480 + ... + 9098.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^13419891 is an apocalyptic number.

13419891 is a deficient number, since it is larger than the sum of its proper divisors (6538509).

13419891 is a wasteful number, since it uses less digits than its factorization.

13419891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935 (or 1929 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 13419891 is about 3663.3169396054. The cubic root of 13419891 is about 237.6382412175.

It can be divided in two parts, 13 and 419891, that added together give a square (419904 = 648²).

The spelling of 13419891 in words is "thirteen million, four hundred nineteen thousand, eight hundred ninety-one".