653405 has 4 divisors (see below), whose sum is σ = 784092. Its totient is φ = 522720.

The previous prime is 653363. The next prime is 653431. The reversal of 653405 is 504356.

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

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 337561 = 562^2 + 581^2 .

It is not a de Polignac number, because 653405 - 2¹⁰ = 652381 is a prime.

It is a Duffinian number.

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 653405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65336 + ... + 65345.

It is an arithmetic number, because the mean of its divisors is an integer number (196023).

2⁶⁵³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

653405 is a deficient number, since it is larger than the sum of its proper divisors (130687).

653405 is a wasteful number, since it uses less digits than its factorization.

653405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130686.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 653405 is about 808.3347079026. The cubic root of 653405 is about 86.7749058537.

The spelling of 653405 in words is "six hundred fifty-three thousand, four hundred five".