13439759684437 has 2 divisors, whose sum is σ = 13439759684438. Its totient is φ = 13439759684436.

The previous prime is 13439759684401. The next prime is 13439759684453. The reversal of 13439759684437 is 73448695793431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10888475453361 + 2551284231076 = 3299769^2 + 1597274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13439759684437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13439759684437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13439759684237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719879842218 + 6719879842219.

It is an arithmetic number, because the mean of its divisors is an integer number (6719879842219).

Almost surely, 2^{13439759684437} is an apocalyptic number.

It is an amenable number.

13439759684437 is a deficient number, since it is larger than the sum of its proper divisors (1).

13439759684437 is an equidigital number, since it uses as much as digits as its factorization.

13439759684437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646023680, while the sum is 73.

The spelling of 13439759684437 in words is "thirteen trillion, four hundred thirty-nine billion, seven hundred fifty-nine million, six hundred eighty-four thousand, four hundred thirty-seven".