420631673 has 32 divisors (see below), whose sum is σ = 534374400. Its totient is φ = 321615360.

The previous prime is 420631667. The next prime is 420631693. The reversal of 420631673 is 376136024.

It is not a de Polignac number, because 420631673 - 2⁴ = 420631657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420631693) 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 31 ways as a sum of consecutive naturals, for example, 1486190 + ... + 1486472.

It is an arithmetic number, because the mean of its divisors is an integer number (16699200).

Almost surely, 2^420631673 is an apocalyptic number.

It is an amenable number.

420631673 is a deficient number, since it is larger than the sum of its proper divisors (113742727).

420631673 is a wasteful number, since it uses less digits than its factorization.

420631673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 420631673 is about 20509.3069848788. The cubic root of 420631673 is about 749.2624886367.

Adding to 420631673 its reverse (376136024), we get a palindrome (796767697).

The spelling of 420631673 in words is "four hundred twenty million, six hundred thirty-one thousand, six hundred seventy-three".