421429727 has 2 divisors, whose sum is σ = 421429728. Its totient is φ = 421429726.

The previous prime is 421429703. The next prime is 421429787. The reversal of 421429727 is 727924124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421429727 - 2⁸ = 421429471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421429787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210714863 + 210714864.

It is an arithmetic number, because the mean of its divisors is an integer number (210714864).

Almost surely, 2^421429727 is an apocalyptic number.

421429727 is a deficient number, since it is larger than the sum of its proper divisors (1).

421429727 is an equidigital number, since it uses as much as digits as its factorization.

421429727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 421429727 is about 20528.7536640684. The cubic root of 421429727 is about 749.7360416307.

The spelling of 421429727 in words is "four hundred twenty-one million, four hundred twenty-nine thousand, seven hundred twenty-seven".