420942947 has 2 divisors, whose sum is σ = 420942948. Its totient is φ = 420942946.

The previous prime is 420942931. The next prime is 420942971. The reversal of 420942947 is 749249024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420942947 - 2⁴ = 420942931 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420945947) 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, 210471473 + 210471474.

It is an arithmetic number, because the mean of its divisors is an integer number (210471474).

Almost surely, 2^420942947 is an apocalyptic number.

420942947 is a deficient number, since it is larger than the sum of its proper divisors (1).

420942947 is an equidigital number, since it uses as much as digits as its factorization.

420942947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 420942947 is about 20516.8941850369. The cubic root of 420942947 is about 749.4472650418.

The spelling of 420942947 in words is "four hundred twenty million, nine hundred forty-two thousand, nine hundred forty-seven".