648306769 has 8 divisors (see below), whose sum is σ = 707579712. Its totient is φ = 589089840.

The previous prime is 648306761. The next prime is 648306787. The reversal of 648306769 is 967603846.

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 648306769 - 2³ = 648306761 is a prime.

It is a super-2 number, since 2×648306769² = 840603333462438722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648306761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12372 + ... + 38074.

It is an arithmetic number, because the mean of its divisors is an integer number (88447464).

Almost surely, 2^648306769 is an apocalyptic number.

It is an amenable number.

648306769 is a deficient number, since it is larger than the sum of its proper divisors (59272943).

648306769 is a wasteful number, since it uses less digits than its factorization.

648306769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28007.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 648306769 is about 25461.8689219782. The cubic root of 648306769 is about 865.4862754125.

The spelling of 648306769 in words is "six hundred forty-eight million, three hundred six thousand, seven hundred sixty-nine".