420727787 has 2 divisors, whose sum is σ = 420727788. Its totient is φ = 420727786.

The previous prime is 420727763. The next prime is 420727793. The reversal of 420727787 is 787727024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420727787 - 2¹² = 420723691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420727757) 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, 210363893 + 210363894.

It is an arithmetic number, because the mean of its divisors is an integer number (210363894).

Almost surely, 2^420727787 is an apocalyptic number.

420727787 is a deficient number, since it is larger than the sum of its proper divisors (1).

420727787 is an equidigital number, since it uses as much as digits as its factorization.

420727787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 307328, while the sum is 44.

The square root of 420727787 is about 20511.6500311408. The cubic root of 420727787 is about 749.3195529165.

The spelling of 420727787 in words is "four hundred twenty million, seven hundred twenty-seven thousand, seven hundred eighty-seven".