13972929217 has 4 divisors (see below), whose sum is σ = 15047769940. Its totient is φ = 12898088496.

The previous prime is 13972929211. The next prime is 13972929239. The reversal of 13972929217 is 71292927931.

13972929217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3527884816 + 10445044401 = 59396^2 + 102201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13972929217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13972929211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537420342 + ... + 537420367.

It is an arithmetic number, because the mean of its divisors is an integer number (3761942485).

Almost surely, 2^13972929217 is an apocalyptic number.

It is an amenable number.

13972929217 is a deficient number, since it is larger than the sum of its proper divisors (1074840723).

13972929217 is a wasteful number, since it uses less digits than its factorization.

13972929217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074840722.

The product of its digits is 857304, while the sum is 52.

The spelling of 13972929217 in words is "thirteen billion, nine hundred seventy-two million, nine hundred twenty-nine thousand, two hundred seventeen".