420842773 has 16 divisors (see below), whose sum is σ = 472058496. Its totient is φ = 372617280.

The previous prime is 420842749. The next prime is 420842777. The reversal of 420842773 is 377248024.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420842773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420842777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27990 + ... + 40312.

It is an arithmetic number, because the mean of its divisors is an integer number (29503656).

Almost surely, 2^420842773 is an apocalyptic number.

It is an amenable number.

420842773 is a deficient number, since it is larger than the sum of its proper divisors (51215723).

420842773 is a wasteful number, since it uses less digits than its factorization.

420842773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 420842773 is about 20514.4527833428. The cubic root of 420842773 is about 749.3878103603.

The spelling of 420842773 in words is "four hundred twenty million, eight hundred forty-two thousand, seven hundred seventy-three".