13440473 has 2 divisors, whose sum is σ = 13440474. Its totient is φ = 13440472.

The previous prime is 13440461. The next prime is 13440529. The reversal of 13440473 is 37404431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 5442889 = 2828^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 13440473 - 2⁶ = 13440409 is a prime.

It is not a weakly prime, because it can be changed into another prime (13440173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6720236 + 6720237.

It is an arithmetic number, because the mean of its divisors is an integer number (6720237).

Almost surely, 2^13440473 is an apocalyptic number.

It is an amenable number.

13440473 is a deficient number, since it is larger than the sum of its proper divisors (1).

13440473 is an equidigital number, since it uses as much as digits as its factorization.

13440473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 13440473 is about 3666.1250660609. The cubic root of 13440473 is about 237.7596672396.

The spelling of 13440473 in words is "thirteen million, four hundred forty thousand, four hundred seventy-three".