427744129 has 2 divisors, whose sum is σ = 427744130. Its totient is φ = 427744128.

The previous prime is 427744117. The next prime is 427744151. The reversal of 427744129 is 921447724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426339904 + 1404225 = 20648^2 + 1185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427744129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 427744091 and 427744100.

It is not a weakly prime, because it can be changed into another prime (427744199) 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, 213872064 + 213872065.

It is an arithmetic number, because the mean of its divisors is an integer number (213872065).

Almost surely, 2^427744129 is an apocalyptic number.

It is an amenable number.

427744129 is a deficient number, since it is larger than the sum of its proper divisors (1).

427744129 is an equidigital number, since it uses as much as digits as its factorization.

427744129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 427744129 is about 20681.9759452524. The cubic root of 427744129 is about 753.4619972153.

The spelling of 427744129 in words is "four hundred twenty-seven million, seven hundred forty-four thousand, one hundred twenty-nine".