420605653 has 16 divisors (see below), whose sum is σ = 480453120. Its totient is φ = 364766976.

The previous prime is 420605651. The next prime is 420605663. The reversal of 420605653 is 356506024.

It is a cyclic number.

It is not a de Polignac number, because 420605653 - 2¹ = 420605651 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 (420605651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157576 + ... + 160222.

It is an arithmetic number, because the mean of its divisors is an integer number (30028320).

Almost surely, 2^420605653 is an apocalyptic number.

It is an amenable number.

420605653 is a deficient number, since it is larger than the sum of its proper divisors (59847467).

420605653 is a wasteful number, since it uses less digits than its factorization.

420605653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 420605653 is about 20508.6726289148. The cubic root of 420605653 is about 749.2470386890.

The spelling of 420605653 in words is "four hundred twenty million, six hundred five thousand, six hundred fifty-three".