13613345 has 12 divisors (see below), whose sum is σ = 17355324. Its totient is φ = 10248960.

The previous prime is 13613333. The next prime is 13613357. The reversal of 13613345 is 54331631.

It is an interprime number because it is at equal distance from previous prime (13613333) and next prime (13613357).

It can be written as a sum of positive squares in 6 ways, for example, as 247009 + 13366336 = 497^2 + 3656^2 .

It is not a de Polignac number, because 13613345 - 2¹⁰ = 13612321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 3266 + ... + 6155.

It is an arithmetic number, because the mean of its divisors is an integer number (1446277).

Almost surely, 2^13613345 is an apocalyptic number.

It is an amenable number.

13613345 is a deficient number, since it is larger than the sum of its proper divisors (3741979).

13613345 is an equidigital number, since it uses as much as digits as its factorization.

13613345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460 (or 9443 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 13613345 is about 3689.6266748819. The cubic root of 13613345 is about 238.7746865549.

Adding to 13613345 its reverse (54331631), we get a palindrome (67944976).

The spelling of 13613345 in words is "thirteen million, six hundred thirteen thousand, three hundred forty-five".