13843897 has 4 divisors (see below), whose sum is σ = 14138496. Its totient is φ = 13549300.

The previous prime is 13843891. The next prime is 13843903. The reversal of 13843897 is 79834831.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (13843891) and next prime (13843903).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13843897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13843891) 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, 147229 + ... + 147322.

It is an arithmetic number, because the mean of its divisors is an integer number (3534624).

Almost surely, 2^13843897 is an apocalyptic number.

It is an amenable number.

13843897 is a deficient number, since it is larger than the sum of its proper divisors (294599).

13843897 is an equidigital number, since it uses as much as digits as its factorization.

13843897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294598.

The product of its digits is 145152, while the sum is 43.

The square root of 13843897 is about 3720.7387707282. The cubic root of 13843897 is about 240.1150894772.

The spelling of 13843897 in words is "thirteen million, eight hundred forty-three thousand, eight hundred ninety-seven".