13831949 has 4 divisors (see below), whose sum is σ = 14038464. Its totient is φ = 13625436.

The previous prime is 13831919. The next prime is 13831957. The reversal of 13831949 is 94913831.

It is a happy number.

13831949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-13831949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13831919) 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, 103157 + ... + 103290.

It is an arithmetic number, because the mean of its divisors is an integer number (3509616).

Almost surely, 2^13831949 is an apocalyptic number.

It is an amenable number.

13831949 is a deficient number, since it is larger than the sum of its proper divisors (206515).

13831949 is an equidigital number, since it uses as much as digits as its factorization.

13831949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206514.

The product of its digits is 23328, while the sum is 38.

The square root of 13831949 is about 3719.1328290342. The cubic root of 13831949 is about 240.0459923431.

The spelling of 13831949 in words is "thirteen million, eight hundred thirty-one thousand, nine hundred forty-nine".