129924897617 has 2 divisors, whose sum is σ = 129924897618. Its totient is φ = 129924897616.

The previous prime is 129924897601. The next prime is 129924897623. The reversal of 129924897617 is 716798429921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129836988241 + 87909376 = 360329^2 + 9376^2 .

It is a cyclic number.

It is not a de Polignac number, because 129924897617 - 2⁴ = 129924897601 is a prime.

It is a super-3 number, since 3×129924897617³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (129924897917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64962448808 + 64962448809.

It is an arithmetic number, because the mean of its divisors is an integer number (64962448809).

Almost surely, 2^129924897617 is an apocalyptic number.

It is an amenable number.

129924897617 is a deficient number, since it is larger than the sum of its proper divisors (1).

129924897617 is an equidigital number, since it uses as much as digits as its factorization.

129924897617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 65.

The spelling of 129924897617 in words is "one hundred twenty-nine billion, nine hundred twenty-four million, eight hundred ninety-seven thousand, six hundred seventeen".