13902972509 has 2 divisors, whose sum is σ = 13902972510. Its totient is φ = 13902972508.

The previous prime is 13902972497. The next prime is 13902972529. The reversal of 13902972509 is 90527920931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11405172025 + 2497800484 = 106795^2 + 49978^2 .

It is a cyclic number.

It is not a de Polignac number, because 13902972509 - 2⁸ = 13902972253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13902972529) 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, 6951486254 + 6951486255.

It is an arithmetic number, because the mean of its divisors is an integer number (6951486255).

Almost surely, 2^13902972509 is an apocalyptic number.

It is an amenable number.

13902972509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13902972509 is an equidigital number, since it uses as much as digits as its factorization.

13902972509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 47.

The spelling of 13902972509 in words is "thirteen billion, nine hundred two million, nine hundred seventy-two thousand, five hundred nine".