13861849 has 4 divisors (see below), whose sum is σ = 14591440. Its totient is φ = 13132260.

The previous prime is 13861829. The next prime is 13861853. The reversal of 13861849 is 94816831.

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: 94816831 = 113 ⋅839087.

It is a cyclic number.

It is not a de Polignac number, because 13861849 - 2¹⁹ = 13337561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13861819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364767 + ... + 364804.

It is an arithmetic number, because the mean of its divisors is an integer number (3647860).

Almost surely, 2^13861849 is an apocalyptic number.

13861849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13861849 is a deficient number, since it is larger than the sum of its proper divisors (729591).

13861849 is an equidigital number, since it uses as much as digits as its factorization.

13861849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729590.

The product of its digits is 41472, while the sum is 40.

The square root of 13861849 is about 3723.1504132925. The cubic root of 13861849 is about 240.2188339696.

The spelling of 13861849 in words is "thirteen million, eight hundred sixty-one thousand, eight hundred forty-nine".