13457720117 has 2 divisors, whose sum is σ = 13457720118. Its totient is φ = 13457720116.

The previous prime is 13457720069. The next prime is 13457720119. The reversal of 13457720117 is 71102775431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9508980196 + 3948739921 = 97514^2 + 62839^2 .

It is a cyclic number.

It is not a de Polignac number, because 13457720117 - 2⁸ = 13457719861 is a prime.

It is a super-2 number, since 2×13457720117² (a number of 21 digits) contains 22 as substring.

Together with 13457720119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13457720119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6728860058 + 6728860059.

It is an arithmetic number, because the mean of its divisors is an integer number (6728860059).

Almost surely, 2^13457720117 is an apocalyptic number.

It is an amenable number.

13457720117 is a deficient number, since it is larger than the sum of its proper divisors (1).

13457720117 is an equidigital number, since it uses as much as digits as its factorization.

13457720117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41160, while the sum is 38.

The spelling of 13457720117 in words is "thirteen billion, four hundred fifty-seven million, seven hundred twenty thousand, one hundred seventeen".