13449973 has 2 divisors, whose sum is σ = 13449974. Its totient is φ = 13449972.

The previous prime is 13449971. The next prime is 13449979. The reversal of 13449973 is 37994431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 762129 = 3562^2 + 873^2 .

It is an emirp because it is prime and its reverse (37994431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13449973 - 2¹ = 13449971 is a prime.

Together with 13449971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13449971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724986 + 6724987.

It is an arithmetic number, because the mean of its divisors is an integer number (6724987).

Almost surely, 2^13449973 is an apocalyptic number.

It is an amenable number.

13449973 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449973 is an equidigital number, since it uses as much as digits as its factorization.

13449973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 13449973 is about 3667.4204831189. The cubic root of 13449973 is about 237.8156718380.

The spelling of 13449973 in words is "thirteen million, four hundred forty-nine thousand, nine hundred seventy-three".