420203479 has 2 divisors, whose sum is σ = 420203480. Its totient is φ = 420203478.

The previous prime is 420203477. The next prime is 420203579. The reversal of 420203479 is 974302024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420203479 - 2¹ = 420203477 is a prime.

Together with 420203477, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 420203479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420203473) 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, 210101739 + 210101740.

It is an arithmetic number, because the mean of its divisors is an integer number (210101740).

Almost surely, 2^420203479 is an apocalyptic number.

420203479 is a deficient number, since it is larger than the sum of its proper divisors (1).

420203479 is an equidigital number, since it uses as much as digits as its factorization.

420203479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 420203479 is about 20498.8653100605. The cubic root of 420203479 is about 749.0081579477.

The spelling of 420203479 in words is "four hundred twenty million, two hundred three thousand, four hundred seventy-nine".