13639361 has 2 divisors, whose sum is σ = 13639362. Its totient is φ = 13639360.

The previous prime is 13639333. The next prime is 13639427. The reversal of 13639361 is 16393631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7187761 + 6451600 = 2681^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 13639361 - 2¹⁰ = 13638337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13639331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819680 + 6819681.

It is an arithmetic number, because the mean of its divisors is an integer number (6819681).

Almost surely, 2^13639361 is an apocalyptic number.

It is an amenable number.

13639361 is a deficient number, since it is larger than the sum of its proper divisors (1).

13639361 is an equidigital number, since it uses as much as digits as its factorization.

13639361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The square root of 13639361 is about 3693.1505520355. The cubic root of 13639361 is about 238.9266944874.

The spelling of 13639361 in words is "thirteen million, six hundred thirty-nine thousand, three hundred sixty-one".