653165243 has 4 divisors (see below), whose sum is σ = 655707000. Its totient is φ = 650623488.

The previous prime is 653165213. The next prime is 653165291. The reversal of 653165243 is 342561356.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653165243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653165203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270493 + ... + 1271006.

It is an arithmetic number, because the mean of its divisors is an integer number (163926750).

Almost surely, 2^653165243 is an apocalyptic number.

653165243 is a deficient number, since it is larger than the sum of its proper divisors (2541757).

653165243 is a wasteful number, since it uses less digits than its factorization.

653165243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541756.

The product of its digits is 64800, while the sum is 35.

The square root of 653165243 is about 25557.0977029865. The cubic root of 653165243 is about 867.6429097917.

The spelling of 653165243 in words is "six hundred fifty-three million, one hundred sixty-five thousand, two hundred forty-three".