13709381 has 8 divisors (see below), whose sum is σ = 15691200. Its totient is φ = 11733408.

The previous prime is 13709329. The next prime is 13709387. The reversal of 13709381 is 18390731.

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 13709381 - 2¹⁸ = 13447237 is a prime.

It is a super-2 number, since 2×13709381² = 375894254806322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13709387) 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, 6410 + ... + 8276.

It is an arithmetic number, because the mean of its divisors is an integer number (1961400).

Almost surely, 2^13709381 is an apocalyptic number.

It is an amenable number.

13709381 is a deficient number, since it is larger than the sum of its proper divisors (1981819).

13709381 is a wasteful number, since it uses less digits than its factorization.

13709381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 13709381 is about 3702.6181277577. The cubic root of 13709381 is about 239.3348538909.

The spelling of 13709381 in words is "thirteen million, seven hundred nine thousand, three hundred eighty-one".