648332579 has 4 divisors (see below), whose sum is σ = 676520976. Its totient is φ = 620144184.

The previous prime is 648332569. The next prime is 648332639. The reversal of 648332579 is 975233846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 975233846 = 2 ⋅487616923.

It is a cyclic number.

It is not a de Polignac number, because 648332579 - 2²⁰ = 647284003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648332569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14094164 + ... + 14094209.

It is an arithmetic number, because the mean of its divisors is an integer number (169130244).

Almost surely, 2^648332579 is an apocalyptic number.

648332579 is a deficient number, since it is larger than the sum of its proper divisors (28188397).

648332579 is a wasteful number, since it uses less digits than its factorization.

648332579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28188396.

The product of its digits is 1088640, while the sum is 47.

The square root of 648332579 is about 25462.3757532560. The cubic root of 648332579 is about 865.4977606668.

The spelling of 648332579 in words is "six hundred forty-eight million, three hundred thirty-two thousand, five hundred seventy-nine".