648529 has 4 divisors (see below), whose sum is σ = 741184. Its totient is φ = 555876.

The previous prime is 648509. The next prime is 648563. The reversal of 648529 is 925846.

It is a happy number.

648529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648529 - 2¹⁵ = 615761 is a prime.

It is a Duffinian number.

648529 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 648494 and 648503.

It is not an unprimeable number, because it can be changed into a prime (648509) 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, 46317 + ... + 46330.

It is an arithmetic number, because the mean of its divisors is an integer number (185296).

2⁶⁴⁸⁵²⁹ is an apocalyptic number.

It is an amenable number.

648529 is a deficient number, since it is larger than the sum of its proper divisors (92655).

648529 is an equidigital number, since it uses as much as digits as its factorization.

648529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92654.

The product of its digits is 17280, while the sum is 34.

The square root of 648529 is about 805.3129826347. The cubic root of 648529 is about 86.5585156537.

The spelling of 648529 in words is "six hundred forty-eight thousand, five hundred twenty-nine".