648069 has 4 divisors (see below), whose sum is σ = 864096. Its totient is φ = 432044.

The previous prime is 648061. The next prime is 648073. The reversal of 648069 is 960846.

648069 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 648069 - 2³ = 648061 is a prime.

It is a super-2 number, since 2×648069² = 839986857522, which contains 22 as substring.

It is a D-number.

648069 is a lucky 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 648069.

It is not an unprimeable number, because it can be changed into a prime (648061) 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, 108009 + ... + 108014.

It is an arithmetic number, because the mean of its divisors is an integer number (216024).

2⁶⁴⁸⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

648069 is a deficient number, since it is larger than the sum of its proper divisors (216027).

648069 is a wasteful number, since it uses less digits than its factorization.

648069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216026.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 648069 is about 805.0273287287. The cubic root of 648069 is about 86.5380455669.

The spelling of 648069 in words is "six hundred forty-eight thousand, sixty-nine".