653727145 has 4 divisors (see below), whose sum is σ = 784472580. Its totient is φ = 522981712.

The previous prime is 653727131. The next prime is 653727149. The reversal of 653727145 is 541727356.

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 435515161 + 218211984 = 20869^2 + 14772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653727145 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 653727098 and 653727107.

It is not an unprimeable number, because it can be changed into a prime (653727149) 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, 65372710 + ... + 65372719.

It is an arithmetic number, because the mean of its divisors is an integer number (196118145).

Almost surely, 2^653727145 is an apocalyptic number.

It is an amenable number.

653727145 is a deficient number, since it is larger than the sum of its proper divisors (130745435).

653727145 is a wasteful number, since it uses less digits than its factorization.

653727145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130745434.

The product of its digits is 176400, while the sum is 40.

The square root of 653727145 is about 25568.0884111425. The cubic root of 653727145 is about 867.8916424336.

The spelling of 653727145 in words is "six hundred fifty-three million, seven hundred twenty-seven thousand, one hundred forty-five".