420680773 has 2 divisors, whose sum is σ = 420680774. Its totient is φ = 420680772.

The previous prime is 420680753. The next prime is 420680783. The reversal of 420680773 is 377086024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414814689 + 5866084 = 20367^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420680773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420680753) 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, 210340386 + 210340387.

It is an arithmetic number, because the mean of its divisors is an integer number (210340387).

Almost surely, 2^420680773 is an apocalyptic number.

It is an amenable number.

420680773 is a deficient number, since it is larger than the sum of its proper divisors (1).

420680773 is an equidigital number, since it uses as much as digits as its factorization.

420680773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 420680773 is about 20510.5039674797. The cubic root of 420680773 is about 749.2916411068.

The spelling of 420680773 in words is "four hundred twenty million, six hundred eighty thousand, seven hundred seventy-three".