13901381 has 8 divisors (see below), whose sum is σ = 15375864. Its totient is φ = 12484800.

The previous prime is 13901357. The next prime is 13901413. The reversal of 13901381 is 18310931.

It can be written as a sum of positive squares in 4 ways, for example, as 7317025 + 6584356 = 2705^2 + 2566^2 .

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 13901381 - 2¹⁰ = 13900357 is a prime.

It is a super-2 number, since 2×13901381² = 386496787414322, which contains 22 as substring.

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 13901381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13901311) 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 7 ways as a sum of consecutive naturals, for example, 13970 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (1921983).

Almost surely, 2^13901381 is an apocalyptic number.

It is an amenable number.

13901381 is a deficient number, since it is larger than the sum of its proper divisors (1474483).

13901381 is a wasteful number, since it uses less digits than its factorization.

13901381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28951.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 13901381 is about 3728.4555783863. The cubic root of 13901381 is about 240.4469737564.

The spelling of 13901381 in words is "thirteen million, nine hundred one thousand, three hundred eighty-one".