427429621 has 2 divisors, whose sum is σ = 427429622. Its totient is φ = 427429620.

The previous prime is 427429603. The next prime is 427429679. The reversal of 427429621 is 126924724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421480900 + 5948721 = 20530^2 + 2439^2 .

It is a cyclic number.

It is not a de Polignac number, because 427429621 - 2⁹ = 427429109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427429021) 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, 213714810 + 213714811.

It is an arithmetic number, because the mean of its divisors is an integer number (213714811).

Almost surely, 2^427429621 is an apocalyptic number.

It is an amenable number.

427429621 is a deficient number, since it is larger than the sum of its proper divisors (1).

427429621 is an equidigital number, since it uses as much as digits as its factorization.

427429621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 427429621 is about 20674.3711149820. The cubic root of 427429621 is about 753.2772855988.

The spelling of 427429621 in words is "four hundred twenty-seven million, four hundred twenty-nine thousand, six hundred twenty-one".