16872429517 has 2 divisors, whose sum is σ = 16872429518. Its totient is φ = 16872429516.

The previous prime is 16872429491. The next prime is 16872429523. The reversal of 16872429517 is 71592427861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8528337801 + 8344091716 = 92349^2 + 91346^2 .

It is a cyclic number.

It is not a de Polignac number, because 16872429517 - 2⁷ = 16872429389 is a prime.

It is a super-2 number, since 2×16872429517² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16872429527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8436214758 + 8436214759.

It is an arithmetic number, because the mean of its divisors is an integer number (8436214759).

Almost surely, 2^16872429517 is an apocalyptic number.

It is an amenable number.

16872429517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16872429517 is an equidigital number, since it uses as much as digits as its factorization.

16872429517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The spelling of 16872429517 in words is "sixteen billion, eight hundred seventy-two million, four hundred twenty-nine thousand, five hundred seventeen".