17440013 has 2 divisors, whose sum is σ = 17440014. Its totient is φ = 17440012.

The previous prime is 17440009. The next prime is 17440039. The reversal of 17440013 is 31004471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17123044 + 316969 = 4138^2 + 563^2 .

It is an emirp because it is prime and its reverse (31004471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17440013 - 2² = 17440009 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17442013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8720006 + 8720007.

It is an arithmetic number, because the mean of its divisors is an integer number (8720007).

Almost surely, 2^17440013 is an apocalyptic number.

It is an amenable number.

17440013 is a deficient number, since it is larger than the sum of its proper divisors (1).

17440013 is an equidigital number, since it uses as much as digits as its factorization.

17440013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 17440013 is about 4176.1241600316. The cubic root of 17440013 is about 259.3277158302.

Adding to 17440013 its reverse (31004471), we get a palindrome (48444484).

The spelling of 17440013 in words is "seventeen million, four hundred forty thousand, thirteen".