427252169 has 2 divisors, whose sum is σ = 427252170. Its totient is φ = 427252168.

The previous prime is 427252151. The next prime is 427252181. The reversal of 427252169 is 961252724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301543225 + 125708944 = 17365^2 + 11212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427252169 is a prime.

It is a super-2 number, since 2×427252169² = 365088831830409122, which contains 22 as substring.

It is equal to p_22709774 and since 427252169 and 22709774 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (427251169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213626084 + 213626085.

It is an arithmetic number, because the mean of its divisors is an integer number (213626085).

Almost surely, 2^427252169 is an apocalyptic number.

It is an amenable number.

427252169 is a deficient number, since it is larger than the sum of its proper divisors (1).

427252169 is an equidigital number, since it uses as much as digits as its factorization.

427252169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 427252169 is about 20670.0790758042. The cubic root of 427252169 is about 753.1730274497.

The spelling of 427252169 in words is "four hundred twenty-seven million, two hundred fifty-two thousand, one hundred sixty-nine".