420492073 has 2 divisors, whose sum is σ = 420492074. Its totient is φ = 420492072.

The previous prime is 420492043. The next prime is 420492101. The reversal of 420492073 is 370294024.

It is the 8372-nd star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388365849 + 32126224 = 19707^2 + 5668^2 .

It is a cyclic number.

It is not a de Polignac number, because 420492073 - 2¹⁷ = 420361001 is a prime.

It is equal to p_22369234 and since 420492073 and 22369234 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 (420492043) 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, 210246036 + 210246037.

It is an arithmetic number, because the mean of its divisors is an integer number (210246037).

Almost surely, 2^420492073 is an apocalyptic number.

It is an amenable number.

420492073 is a deficient number, since it is larger than the sum of its proper divisors (1).

420492073 is an equidigital number, since it uses as much as digits as its factorization.

420492073 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 420492073 is about 20505.9033695178. The cubic root of 420492073 is about 749.1795906022.

The spelling of 420492073 in words is "four hundred twenty million, four hundred ninety-two thousand, seventy-three".