420171707 has 2 divisors, whose sum is σ = 420171708. Its totient is φ = 420171706.

The previous prime is 420171683. The next prime is 420171709. The reversal of 420171707 is 707171024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420171707 - 2¹⁶ = 420106171 is a prime.

Together with 420171709, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420171707.

It is not a weakly prime, because it can be changed into another prime (420171709) 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, 210085853 + 210085854.

It is an arithmetic number, because the mean of its divisors is an integer number (210085854).

Almost surely, 2^420171707 is an apocalyptic number.

420171707 is a deficient number, since it is larger than the sum of its proper divisors (1).

420171707 is an equidigital number, since it uses as much as digits as its factorization.

420171707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 420171707 is about 20498.0903256864. The cubic root of 420171707 is about 748.9892797231.

The spelling of 420171707 in words is "four hundred twenty million, one hundred seventy-one thousand, seven hundred seven".