13872123329 has 2 divisors, whose sum is σ = 13872123330. Its totient is φ = 13872123328.

The previous prime is 13872123299. The next prime is 13872123389. The reversal of 13872123329 is 92332127831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13701873025 + 170250304 = 117055^2 + 13048^2 .

It is a cyclic number.

It is not a de Polignac number, because 13872123329 - 2²⁸ = 13603687873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13872123389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6936061664 + 6936061665.

It is an arithmetic number, because the mean of its divisors is an integer number (6936061665).

Almost surely, 2^13872123329 is an apocalyptic number.

It is an amenable number.

13872123329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13872123329 is an equidigital number, since it uses as much as digits as its factorization.

13872123329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The spelling of 13872123329 in words is "thirteen billion, eight hundred seventy-two million, one hundred twenty-three thousand, three hundred twenty-nine".