648827819 has 8 divisors (see below), whose sum is σ = 668057328. Its totient is φ = 629687520.

The previous prime is 648827813. The next prime is 648827833. The reversal of 648827819 is 918728846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648827819 - 2²⁰ = 647779243 is a prime.

It is a super-2 number, since 2×648827819² = 841955077416593522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648827813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7397 + ... + 36774.

It is an arithmetic number, because the mean of its divisors is an integer number (83507166).

Almost surely, 2^648827819 is an apocalyptic number.

648827819 is a deficient number, since it is larger than the sum of its proper divisors (19229509).

648827819 is a wasteful number, since it uses less digits than its factorization.

648827819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44605.

The product of its digits is 1548288, while the sum is 53.

The square root of 648827819 is about 25472.0988338221. The cubic root of 648827819 is about 865.7180796988.

The spelling of 648827819 in words is "six hundred forty-eight million, eight hundred twenty-seven thousand, eight hundred nineteen".