648429259 has 4 divisors (see below), whose sum is σ = 649273240. Its totient is φ = 647585280.

The previous prime is 648429253. The next prime is 648429269. The reversal of 648429259 is 952924846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952924846 = 2 ⋅476462423.

It is a cyclic number.

It is not a de Polignac number, because 648429259 - 2³ = 648429251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648429251) 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, 420837 + ... + 422374.

It is an arithmetic number, because the mean of its divisors is an integer number (162318310).

Almost surely, 2^648429259 is an apocalyptic number.

648429259 is a deficient number, since it is larger than the sum of its proper divisors (843981).

648429259 is an equidigital number, since it uses as much as digits as its factorization.

648429259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843980.

The product of its digits is 1244160, while the sum is 49.

The square root of 648429259 is about 25464.2741699032. The cubic root of 648429259 is about 865.5407798246.

The spelling of 648429259 in words is "six hundred forty-eight million, four hundred twenty-nine thousand, two hundred fifty-nine".