653642273 has 4 divisors (see below), whose sum is σ = 655873428. Its totient is φ = 651411120.

The previous prime is 653642261. The next prime is 653642279. The reversal of 653642273 is 372246356.

It is a happy number.

653642273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 596971489 + 56670784 = 24433^2 + 7528^2 .

It is a cyclic number.

It is not a de Polignac number, because 653642273 - 2¹⁸ = 653380129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653642279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115138 + ... + 1115723.

It is an arithmetic number, because the mean of its divisors is an integer number (163968357).

Almost surely, 2^653642273 is an apocalyptic number.

It is an amenable number.

653642273 is a deficient number, since it is larger than the sum of its proper divisors (2231155).

653642273 is a wasteful number, since it uses less digits than its factorization.

653642273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231154.

The product of its digits is 181440, while the sum is 38.

The square root of 653642273 is about 25566.4286320949. The cubic root of 653642273 is about 867.8540819683.

The spelling of 653642273 in words is "six hundred fifty-three million, six hundred forty-two thousand, two hundred seventy-three".