172423642006669 has 2 divisors, whose sum is σ = 172423642006670. Its totient is φ = 172423642006668.

The previous prime is 172423642006613. The next prime is 172423642006699. The reversal of 172423642006669 is 966600246324271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135840656704900 + 36582985301769 = 11655070^2 + 6048387^2 .

It is a cyclic number.

It is not a de Polignac number, because 172423642006669 - 2²⁷ = 172423507788941 is a prime.

It is a super-2 number, since 2×172423642006669² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172423642006699) 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, 86211821003334 + 86211821003335.

It is an arithmetic number, because the mean of its divisors is an integer number (86211821003335).

Almost surely, 2^{172423642006669} is an apocalyptic number.

It is an amenable number.

172423642006669 is a deficient number, since it is larger than the sum of its proper divisors (1).

172423642006669 is an equidigital number, since it uses as much as digits as its factorization.

172423642006669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 58.

The spelling of 172423642006669 in words is "one hundred seventy-two trillion, four hundred twenty-three billion, six hundred forty-two million, six thousand, six hundred sixty-nine".