13473721 has 2 divisors, whose sum is σ = 13473722. Its totient is φ = 13473720.

The previous prime is 13473689. The next prime is 13473751. The reversal of 13473721 is 12737431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6817321 + 6656400 = 2611^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 13473721 - 2⁵ = 13473689 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13473721.

It is not a weakly prime, because it can be changed into another prime (13473751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6736860 + 6736861.

It is an arithmetic number, because the mean of its divisors is an integer number (6736861).

Almost surely, 2^13473721 is an apocalyptic number.

It is an amenable number.

13473721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13473721 is an equidigital number, since it uses as much as digits as its factorization.

13473721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 13473721 is about 3670.6567532255. The cubic root of 13473721 is about 237.9555562799.

The spelling of 13473721 in words is "thirteen million, four hundred seventy-three thousand, seven hundred twenty-one".