13871049 has 4 divisors (see below), whose sum is σ = 18494736. Its totient is φ = 9247364.

The previous prime is 13871023. The next prime is 13871051. The reversal of 13871049 is 94017831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94017831 = 3 ⋅31339277.

It is a cyclic number.

It is not a de Polignac number, because 13871049 - 2⁷ = 13870921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13871149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311839 + ... + 2311844.

It is an arithmetic number, because the mean of its divisors is an integer number (4623684).

Almost surely, 2^13871049 is an apocalyptic number.

It is an amenable number.

13871049 is a deficient number, since it is larger than the sum of its proper divisors (4623687).

13871049 is an equidigital number, since it uses as much as digits as its factorization.

13871049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623686.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 13871049 is about 3724.3857211626. The cubic root of 13871049 is about 240.2719659995.

The spelling of 13871049 in words is "thirteen million, eight hundred seventy-one thousand, forty-nine".