420942971 has 2 divisors, whose sum is σ = 420942972. Its totient is φ = 420942970.

The previous prime is 420942947. The next prime is 420942979. The reversal of 420942971 is 179249024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420942971 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (420942979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210471485 + 210471486.

It is an arithmetic number, because the mean of its divisors is an integer number (210471486).

Almost surely, 2^420942971 is an apocalyptic number.

420942971 is a deficient number, since it is larger than the sum of its proper divisors (1).

420942971 is an equidigital number, since it uses as much as digits as its factorization.

420942971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 420942971 is about 20516.8947699207. The cubic root of 420942971 is about 749.4472792850.

The spelling of 420942971 in words is "four hundred twenty million, nine hundred forty-two thousand, nine hundred seventy-one".