172980788329 has 2 divisors, whose sum is σ = 172980788330. Its totient is φ = 172980788328.

The previous prime is 172980788311. The next prime is 172980788401. The reversal of 172980788329 is 923887089271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112785147225 + 60195641104 = 335835^2 + 245348^2 .

It is a cyclic number.

It is not a de Polignac number, because 172980788329 - 2¹¹ = 172980786281 is a prime.

It is a super-2 number, since 2×172980788329² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173980788329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86490394164 + 86490394165.

It is an arithmetic number, because the mean of its divisors is an integer number (86490394165).

Almost surely, 2^172980788329 is an apocalyptic number.

It is an amenable number.

172980788329 is a deficient number, since it is larger than the sum of its proper divisors (1).

172980788329 is an equidigital number, since it uses as much as digits as its factorization.

172980788329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The spelling of 172980788329 in words is "one hundred seventy-two billion, nine hundred eighty million, seven hundred eighty-eight thousand, three hundred twenty-nine".