13447949 has 4 divisors (see below), whose sum is σ = 13760736. Its totient is φ = 13135164.

The previous prime is 13447943. The next prime is 13447957. The reversal of 13447949 is 94974431.

13447949 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 not a de Polignac number, because 13447949 - 2¹² = 13443853 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 (13447943) 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, 156329 + ... + 156414.

It is an arithmetic number, because the mean of its divisors is an integer number (3440184).

Almost surely, 2^13447949 is an apocalyptic number.

It is an amenable number.

13447949 is a deficient number, since it is larger than the sum of its proper divisors (312787).

13447949 is an equidigital number, since it uses as much as digits as its factorization.

13447949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312786.

The product of its digits is 108864, while the sum is 41.

The square root of 13447949 is about 3667.1445294670. The cubic root of 13447949 is about 237.8037421222.

The spelling of 13447949 in words is "thirteen million, four hundred forty-seven thousand, nine hundred forty-nine".