13381911 has 12 divisors (see below), whose sum is σ = 19361160. Its totient is φ = 8906640.

The previous prime is 13381903. The next prime is 13381913. The reversal of 13381911 is 11918331.

It is a happy number.

It is not a de Polignac number, because 13381911 - 2³ = 13381903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13381913) 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 11 ways as a sum of consecutive naturals, for example, 10000 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (1613430).

Almost surely, 2^13381911 is an apocalyptic number.

13381911 is a deficient number, since it is larger than the sum of its proper divisors (5979249).

13381911 is a wasteful number, since it uses less digits than its factorization.

13381911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446 (or 2443 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 13381911 is about 3658.1294400281. The cubic root of 13381911 is about 237.4138472377.

It can be divided in two parts, 1338 and 1911, that added together give a square (3249 = 57²).

The spelling of 13381911 in words is "thirteen million, three hundred eighty-one thousand, nine hundred eleven".