427434181 has 2 divisors, whose sum is σ = 427434182. Its totient is φ = 427434180.

The previous prime is 427434157. The next prime is 427434187. The reversal of 427434181 is 181434724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388484100 + 38950081 = 19710^2 + 6241^2 .

It is a cyclic number.

It is not a de Polignac number, because 427434181 - 2⁵ = 427434149 is a prime.

It is a super-2 number, since 2×427434181² = 365399958174281522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427434187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213717090 + 213717091.

It is an arithmetic number, because the mean of its divisors is an integer number (213717091).

Almost surely, 2^427434181 is an apocalyptic number.

It is an amenable number.

427434181 is a deficient number, since it is larger than the sum of its proper divisors (1).

427434181 is an equidigital number, since it uses as much as digits as its factorization.

427434181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 427434181 is about 20674.4813961560. The cubic root of 427434181 is about 753.2799643495.

The spelling of 427434181 in words is "four hundred twenty-seven million, four hundred thirty-four thousand, one hundred eighty-one".