13721805907 has 2 divisors, whose sum is σ = 13721805908. Its totient is φ = 13721805906.

The previous prime is 13721805883. The next prime is 13721805919. The reversal of 13721805907 is 70950812731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13721805907 is a prime.

It is not a weakly prime, because it can be changed into another prime (13721806907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860902953 + 6860902954.

It is an arithmetic number, because the mean of its divisors is an integer number (6860902954).

Almost surely, 2^13721805907 is an apocalyptic number.

13721805907 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721805907 is an equidigital number, since it uses as much as digits as its factorization.

13721805907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 13721805907 in words is "thirteen billion, seven hundred twenty-one million, eight hundred five thousand, nine hundred seven".