653450443 has 4 divisors (see below), whose sum is σ = 654868368. Its totient is φ = 652032520.

The previous prime is 653450431. The next prime is 653450461. The reversal of 653450443 is 344054356.

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

It is a cyclic number.

It is not a de Polignac number, because 653450443 - 2¹⁷ = 653319371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 653450399 and 653450408.

It is not an unprimeable number, because it can be changed into a prime (653450543) 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, 708271 + ... + 709192.

It is an arithmetic number, because the mean of its divisors is an integer number (163717092).

Almost surely, 2^653450443 is an apocalyptic number.

653450443 is a deficient number, since it is larger than the sum of its proper divisors (1417925).

653450443 is a wasteful number, since it uses less digits than its factorization.

653450443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417924.

The product of its (nonzero) digits is 86400, while the sum is 34.

The square root of 653450443 is about 25562.6767573351. The cubic root of 653450443 is about 867.7691748031.

The spelling of 653450443 in words is "six hundred fifty-three million, four hundred fifty thousand, four hundred forty-three".