13449971 has 2 divisors, whose sum is σ = 13449972. Its totient is φ = 13449970.

The previous prime is 13449949. The next prime is 13449973. The reversal of 13449971 is 17994431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13449971 is a prime.

Together with 13449973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13449973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724985 + 6724986.

It is an arithmetic number, because the mean of its divisors is an integer number (6724986).

Almost surely, 2^13449971 is an apocalyptic number.

13449971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449971 is an equidigital number, since it uses as much as digits as its factorization.

13449971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 13449971 is about 3667.4202104477. The cubic root of 13449971 is about 237.8156600503.

It can be divided in two parts, 134 and 49971, that added together give a palindrome (50105).

The spelling of 13449971 in words is "thirteen million, four hundred forty-nine thousand, nine hundred seventy-one".