653403 has 8 divisors (see below), whose sum is σ = 875088. Its totient is φ = 433664.

The previous prime is 653363. The next prime is 653431. The reversal of 653403 is 304356.

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 653403 - 2⁶ = 653339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 653403.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653403.

It is not an unprimeable number, because it can be changed into a prime (653473) 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, 751 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (109386).

2⁶⁵³⁴⁰³ is an apocalyptic number.

653403 is a deficient number, since it is larger than the sum of its proper divisors (221685).

653403 is a wasteful number, since it uses less digits than its factorization.

653403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 653403 is about 808.3334707904. Note that the first 3 decimals coincide. The cubic root of 653403 is about 86.7748173175.

Adding to 653403 its reverse (304356), we get a palindrome (957759).

The spelling of 653403 in words is "six hundred fifty-three thousand, four hundred three".