648236019 has 4 divisors (see below), whose sum is σ = 864314696. Its totient is φ = 432157344.

The previous prime is 648235999. The next prime is 648236021. The reversal of 648236019 is 910632846.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 648236019 - 2²⁷ = 514018291 is a prime.

It is a super-2 number, since 2×648236019² = 840419872657936722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648236089) 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, 108039334 + ... + 108039339.

It is an arithmetic number, because the mean of its divisors is an integer number (216078674).

Almost surely, 2^648236019 is an apocalyptic number.

648236019 is a deficient number, since it is larger than the sum of its proper divisors (216078677).

648236019 is a wasteful number, since it uses less digits than its factorization.

648236019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216078676.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 648236019 is about 25460.4795516502. The cubic root of 648236019 is about 865.4547906358.

The spelling of 648236019 in words is "six hundred forty-eight million, two hundred thirty-six thousand, nineteen".