420802673 has 4 divisors (see below), whose sum is σ = 435313140. Its totient is φ = 406292208.

The previous prime is 420802667. The next prime is 420802727. The reversal of 420802673 is 376208024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194239969 + 226562704 = 13937^2 + 15052^2 .

It is a cyclic number.

It is not a de Polignac number, because 420802673 - 2²⁸ = 152367217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420802973) 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 3 ways as a sum of consecutive naturals, for example, 7255190 + ... + 7255247.

It is an arithmetic number, because the mean of its divisors is an integer number (108828285).

Almost surely, 2^420802673 is an apocalyptic number.

It is an amenable number.

420802673 is a deficient number, since it is larger than the sum of its proper divisors (14510467).

420802673 is a wasteful number, since it uses less digits than its factorization.

420802673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14510466.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 420802673 is about 20513.4754003314. The cubic root of 420802673 is about 749.3640078006.

The spelling of 420802673 in words is "four hundred twenty million, eight hundred two thousand, six hundred seventy-three".