420577819 has 2 divisors, whose sum is σ = 420577820. Its totient is φ = 420577818.

The previous prime is 420577813. The next prime is 420577847. The reversal of 420577819 is 918775024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420577819 - 2³ = 420577811 is a prime.

It is a super-2 number, since 2×420577819² = 353771403669593522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420577811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210288909 + 210288910.

It is an arithmetic number, because the mean of its divisors is an integer number (210288910).

Almost surely, 2^420577819 is an apocalyptic number.

420577819 is a deficient number, since it is larger than the sum of its proper divisors (1).

420577819 is an equidigital number, since it uses as much as digits as its factorization.

420577819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 420577819 is about 20507.9940267204. The cubic root of 420577819 is about 749.2305109336.

The spelling of 420577819 in words is "four hundred twenty million, five hundred seventy-seven thousand, eight hundred nineteen".