423551202169 has 2 divisors, whose sum is σ = 423551202170. Its totient is φ = 423551202168.

The previous prime is 423551202167. The next prime is 423551202211. The reversal of 423551202169 is 961202155324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284396090944 + 139155111225 = 533288^2 + 373035^2 .

It is a cyclic number.

It is not a de Polignac number, because 423551202169 - 2¹ = 423551202167 is a prime.

It is a super-2 number, since 2×423551202169² (a number of 24 digits) contains 22 as substring.

Together with 423551202167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (423551202167) 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, 211775601084 + 211775601085.

It is an arithmetic number, because the mean of its divisors is an integer number (211775601085).

Almost surely, 2^423551202169 is an apocalyptic number.

It is an amenable number.

423551202169 is a deficient number, since it is larger than the sum of its proper divisors (1).

423551202169 is an equidigital number, since it uses as much as digits as its factorization.

423551202169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 423551202169 in words is "four hundred twenty-three billion, five hundred fifty-one million, two hundred two thousand, one hundred sixty-nine".