653551523 has 4 divisors (see below), whose sum is σ = 653636808. Its totient is φ = 653466240.

The previous prime is 653551501. The next prime is 653551543. The reversal of 653551523 is 325155356.

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 653551523 - 2⁸ = 653551267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653551543) 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, 29873 + ... + 46898.

It is an arithmetic number, because the mean of its divisors is an integer number (163409202).

Almost surely, 2^653551523 is an apocalyptic number.

653551523 is a deficient number, since it is larger than the sum of its proper divisors (85285).

653551523 is an equidigital number, since it uses as much as digits as its factorization.

653551523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85284.

The product of its digits is 67500, while the sum is 35.

The square root of 653551523 is about 25564.6537821266. The cubic root of 653551523 is about 867.8139165718.

The spelling of 653551523 in words is "six hundred fifty-three million, five hundred fifty-one thousand, five hundred twenty-three".