420271673 has 8 divisors (see below), whose sum is σ = 422358888. Its totient is φ = 418189824.

The previous prime is 420271669. The next prime is 420271679. The reversal of 420271673 is 376172024.

It can be written as a sum of positive squares in 4 ways, for example, as 1373584 + 418898089 = 1172^2 + 20467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420271673 - 2² = 420271669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420271679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292565 + ... + 293997.

It is an arithmetic number, because the mean of its divisors is an integer number (52794861).

Almost surely, 2^420271673 is an apocalyptic number.

It is an amenable number.

420271673 is a deficient number, since it is larger than the sum of its proper divisors (2087215).

420271673 is a wasteful number, since it uses less digits than its factorization.

420271673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 420271673 is about 20500.5286029409. The cubic root of 420271673 is about 749.0486741119.

The spelling of 420271673 in words is "four hundred twenty million, two hundred seventy-one thousand, six hundred seventy-three".