420179923 has 2 divisors, whose sum is σ = 420179924. Its totient is φ = 420179922.

The previous prime is 420179909. The next prime is 420179941. The reversal of 420179923 is 329971024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420179923 - 2⁵ = 420179891 is a prime.

It is not a weakly prime, because it can be changed into another prime (420176923) 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, 210089961 + 210089962.

It is an arithmetic number, because the mean of its divisors is an integer number (210089962).

Almost surely, 2^420179923 is an apocalyptic number.

420179923 is a deficient number, since it is larger than the sum of its proper divisors (1).

420179923 is an equidigital number, since it uses as much as digits as its factorization.

420179923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 420179923 is about 20498.2907336197. The cubic root of 420179923 is about 748.9941615811.

The spelling of 420179923 in words is "four hundred twenty million, one hundred seventy-nine thousand, nine hundred twenty-three".