13287433261 has 2 divisors, whose sum is σ = 13287433262. Its totient is φ = 13287433260.

The previous prime is 13287433259. The next prime is 13287433277. The reversal of 13287433261 is 16233478231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11882308036 + 1405125225 = 109006^2 + 37485^2 .

It is a cyclic number.

It is not a de Polignac number, because 13287433261 - 2¹ = 13287433259 is a prime.

Together with 13287433259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13287433241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643716630 + 6643716631.

It is an arithmetic number, because the mean of its divisors is an integer number (6643716631).

Almost surely, 2^13287433261 is an apocalyptic number.

It is an amenable number.

13287433261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13287433261 is an equidigital number, since it uses as much as digits as its factorization.

13287433261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The spelling of 13287433261 in words is "thirteen billion, two hundred eighty-seven million, four hundred thirty-three thousand, two hundred sixty-one".