420425923 has 2 divisors, whose sum is σ = 420425924. Its totient is φ = 420425922.

The previous prime is 420425911. The next prime is 420425981. The reversal of 420425923 is 329524024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420425923 is a prime.

It is equal to p_22365913 and since 420425923 and 22365913 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (420425023) 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, 210212961 + 210212962.

It is an arithmetic number, because the mean of its divisors is an integer number (210212962).

Almost surely, 2^420425923 is an apocalyptic number.

420425923 is a deficient number, since it is larger than the sum of its proper divisors (1).

420425923 is an equidigital number, since it uses as much as digits as its factorization.

420425923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 420425923 is about 20504.2903559231. The cubic root of 420425923 is about 749.1403026408.

Adding to 420425923 its reverse (329524024), we get a palindrome (749949947).

The spelling of 420425923 in words is "four hundred twenty million, four hundred twenty-five thousand, nine hundred twenty-three".