420953773 has 6 divisors (see below), whose sum is σ = 432459114. Its totient is φ = 409455216.

The previous prime is 420953747. The next prime is 420953783. The reversal of 420953773 is 377359024.

It can be written as a sum of positive squares in 3 ways, for example, as 391327524 + 29626249 = 19782^2 + 5443^2 .

It is not a de Polignac number, because 420953773 - 2⁹ = 420953261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420953783) 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 in 5 ways as a sum of consecutive naturals, for example, 123115 + ... + 126487.

It is an arithmetic number, because the mean of its divisors is an integer number (72076519).

Almost surely, 2^420953773 is an apocalyptic number.

It is an amenable number.

420953773 is a deficient number, since it is larger than the sum of its proper divisors (11505341).

420953773 is an frugal number, since it uses more digits than its factorization.

420953773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783 (or 3410 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 420953773 is about 20517.1580146959. The cubic root of 420953773 is about 749.4536898606.

The spelling of 420953773 in words is "four hundred twenty million, nine hundred fifty-three thousand, seven hundred seventy-three".