653959 has 4 divisors (see below), whose sum is σ = 682416. Its totient is φ = 625504.

The previous prime is 653951. The next prime is 653963. The reversal of 653959 is 959356.

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 653959 - 2³ = 653951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653951) 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, 14194 + ... + 14239.

It is an arithmetic number, because the mean of its divisors is an integer number (170604).

2⁶⁵³⁹⁵⁹ is an apocalyptic number.

653959 is a deficient number, since it is larger than the sum of its proper divisors (28457).

653959 is a wasteful number, since it uses less digits than its factorization.

653959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28456.

The product of its digits is 36450, while the sum is 37.

The square root of 653959 is about 808.6773151264. The cubic root of 653959 is about 86.7994234284.

The spelling of 653959 in words is "six hundred fifty-three thousand, nine hundred fifty-nine".