13729973 has 2 divisors, whose sum is σ = 13729974. Its totient is φ = 13729972.

The previous prime is 13729927. The next prime is 13730023. The reversal of 13729973 is 37992731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 4231249 = 3082^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 13729973 - 2²⁰ = 12681397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13729973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13723973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864986 + 6864987.

It is an arithmetic number, because the mean of its divisors is an integer number (6864987).

Almost surely, 2^13729973 is an apocalyptic number.

It is an amenable number.

13729973 is a deficient number, since it is larger than the sum of its proper divisors (1).

13729973 is an equidigital number, since it uses as much as digits as its factorization.

13729973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 41.

The square root of 13729973 is about 3705.3978193981. The cubic root of 13729973 is about 239.4546238944.

The spelling of 13729973 in words is "thirteen million, seven hundred twenty-nine thousand, nine hundred seventy-three".