172941122586209 has 2 divisors, whose sum is σ = 172941122586210. Its totient is φ = 172941122586208.

The previous prime is 172941122586173. The next prime is 172941122586229. The reversal of 172941122586209 is 902685221149271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147446984700625 + 25494137885584 = 12142775^2 + 5049172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172941122586209 is a prime.

It is not a weakly prime, because it can be changed into another prime (172941122586229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86470561293104 + 86470561293105.

It is an arithmetic number, because the mean of its divisors is an integer number (86470561293105).

Almost surely, 2^{172941122586209} is an apocalyptic number.

It is an amenable number.

172941122586209 is a deficient number, since it is larger than the sum of its proper divisors (1).

172941122586209 is an equidigital number, since it uses as much as digits as its factorization.

172941122586209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 172941122586209 in words is "one hundred seventy-two trillion, nine hundred forty-one billion, one hundred twenty-two million, five hundred eighty-six thousand, two hundred nine".