13951247909 has 2 divisors, whose sum is σ = 13951247910. Its totient is φ = 13951247908.

The previous prime is 13951247851. The next prime is 13951247917. The reversal of 13951247909 is 90974215931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13638736225 + 312511684 = 116785^2 + 17678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13951247909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13951247509) 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, 6975623954 + 6975623955.

It is an arithmetic number, because the mean of its divisors is an integer number (6975623955).

Almost surely, 2^13951247909 is an apocalyptic number.

It is an amenable number.

13951247909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13951247909 is an equidigital number, since it uses as much as digits as its factorization.

13951247909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 13951247909 in words is "thirteen billion, nine hundred fifty-one million, two hundred forty-seven thousand, nine hundred nine".