653956013 has 4 divisors (see below), whose sum is σ = 655587228. Its totient is φ = 652324800.

The previous prime is 653955919. The next prime is 653956049. The reversal of 653956013 is 310659356.

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 366416164 + 287539849 = 19142^2 + 16957^2 .

It is a cyclic number.

It is not a de Polignac number, because 653956013 - 2²⁴ = 637178797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653956313) 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, 815006 + ... + 815807.

It is an arithmetic number, because the mean of its divisors is an integer number (163896807).

Almost surely, 2^653956013 is an apocalyptic number.

It is an amenable number.

653956013 is a deficient number, since it is larger than the sum of its proper divisors (1631215).

653956013 is a wasteful number, since it uses less digits than its factorization.

653956013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631214.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 653956013 is about 25572.5636767220. The cubic root of 653956013 is about 867.9929127420.

It can be divided in two parts, 6539560 and 13, that multiplied together give a triangular number (85014280 = T₁₃₀₃₉).

The spelling of 653956013 in words is "six hundred fifty-three million, nine hundred fifty-six thousand, thirteen".