13893905 has 8 divisors (see below), whose sum is σ = 17027712. Its totient is φ = 10878448.

The previous prime is 13893853. The next prime is 13893923. The reversal of 13893905 is 50939831.

13893905 = 66² + 67² + ... + 347².

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 13893905 - 2¹⁰ = 13892881 is a prime.

It is a super-2 number, since 2×13893905² = 386081192298050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29327 + ... + 29796.

It is an arithmetic number, because the mean of its divisors is an integer number (2128464).

Almost surely, 2^13893905 is an apocalyptic number.

It is an amenable number.

13893905 is a deficient number, since it is larger than the sum of its proper divisors (3133807).

13893905 is an equidigital number, since it uses as much as digits as its factorization.

13893905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59175.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 13893905 is about 3727.4528836727. The cubic root of 13893905 is about 240.4038628379.

The spelling of 13893905 in words is "thirteen million, eight hundred ninety-three thousand, nine hundred five".