13963207729 has 2 divisors, whose sum is σ = 13963207730. Its totient is φ = 13963207728.

The previous prime is 13963207639. The next prime is 13963207733. The reversal of 13963207729 is 92770236931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8118911025 + 5844296704 = 90105^2 + 76448^2 .

It is a cyclic number.

It is not a de Polignac number, because 13963207729 - 2¹⁷ = 13963076657 is a prime.

It is not a weakly prime, because it can be changed into another prime (13963207789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6981603864 + 6981603865.

It is an arithmetic number, because the mean of its divisors is an integer number (6981603865).

Almost surely, 2^13963207729 is an apocalyptic number.

It is an amenable number.

13963207729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13963207729 is an equidigital number, since it uses as much as digits as its factorization.

13963207729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 13963207729 in words is "thirteen billion, nine hundred sixty-three million, two hundred seven thousand, seven hundred twenty-nine".