653903 has 2 divisors, whose sum is σ = 653904. Its totient is φ = 653902.

The previous prime is 653899. The next prime is 653927. The reversal of 653903 is 309356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653903 - 2² = 653899 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653903.

It is not a weakly prime, because it can be changed into another prime (653963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326951 + 326952.

It is an arithmetic number, because the mean of its divisors is an integer number (326952).

2⁶⁵³⁹⁰³ is an apocalyptic number.

653903 is a deficient number, since it is larger than the sum of its proper divisors (1).

653903 is an equidigital number, since it uses as much as digits as its factorization.

653903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 653903 is about 808.6426899441. The cubic root of 653903 is about 86.7969457468.

The spelling of 653903 in words is "six hundred fifty-three thousand, nine hundred three".