427271869 has 2 divisors, whose sum is σ = 427271870. Its totient is φ = 427271868.

The previous prime is 427271837. The next prime is 427271891. The reversal of 427271869 is 968172724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242175844 + 185096025 = 15562^2 + 13605^2 .

It is a cyclic number.

It is not a de Polignac number, because 427271869 - 2⁵ = 427271837 is a prime.

It is a super-2 number, since 2×427271869² = 365122500077506322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427271269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213635934 + 213635935.

It is an arithmetic number, because the mean of its divisors is an integer number (213635935).

Almost surely, 2^427271869 is an apocalyptic number.

It is an amenable number.

427271869 is a deficient number, since it is larger than the sum of its proper divisors (1).

427271869 is an equidigital number, since it uses as much as digits as its factorization.

427271869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 427271869 is about 20670.5556045308. Note that the first 3 decimals coincide. The cubic root of 427271869 is about 753.1846031902.

The spelling of 427271869 in words is "four hundred twenty-seven million, two hundred seventy-one thousand, eight hundred sixty-nine".