13912881 has 4 divisors (see below), whose sum is σ = 18550512. Its totient is φ = 9275252.

The previous prime is 13912867. The next prime is 13912901. The reversal of 13912881 is 18821931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13912881 - 2¹¹ = 13910833 is a prime.

It is a super-2 number, since 2×13912881² = 387136515440322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13912841) 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 3 ways as a sum of consecutive naturals, for example, 2318811 + ... + 2318816.

It is an arithmetic number, because the mean of its divisors is an integer number (4637628).

Almost surely, 2^13912881 is an apocalyptic number.

It is an amenable number.

13912881 is a deficient number, since it is larger than the sum of its proper divisors (4637631).

13912881 is an equidigital number, since it uses as much as digits as its factorization.

13912881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637630.

The product of its digits is 3456, while the sum is 33.

The square root of 13912881 is about 3729.9974530822. The cubic root of 13912881 is about 240.5132592105.

The spelling of 13912881 in words is "thirteen million, nine hundred twelve thousand, eight hundred eighty-one".