13732321709 has 2 divisors, whose sum is σ = 13732321710. Its totient is φ = 13732321708.

The previous prime is 13732321663. The next prime is 13732321753. The reversal of 13732321709 is 90712323731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9211776484 + 4520545225 = 95978^2 + 67235^2 .

It is a cyclic number.

It is not a de Polignac number, because 13732321709 - 2⁸ = 13732321453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13732321789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6866160854 + 6866160855.

It is an arithmetic number, because the mean of its divisors is an integer number (6866160855).

Almost surely, 2^13732321709 is an apocalyptic number.

It is an amenable number.

13732321709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13732321709 is an equidigital number, since it uses as much as digits as its factorization.

13732321709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 38.

The spelling of 13732321709 in words is "thirteen billion, seven hundred thirty-two million, three hundred twenty-one thousand, seven hundred nine".