648514297 has 4 divisors (see below), whose sum is σ = 653248116. Its totient is φ = 643780480.

The previous prime is 648514291. The next prime is 648514309. The reversal of 648514297 is 792415846.

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

It can be written as a sum of positive squares in 2 ways, for example, as 417139776 + 231374521 = 20424^2 + 15211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648514297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648514291) 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, 2366704 + ... + 2366977.

It is an arithmetic number, because the mean of its divisors is an integer number (163312029).

Almost surely, 2^648514297 is an apocalyptic number.

It is an amenable number.

648514297 is a deficient number, since it is larger than the sum of its proper divisors (4733819).

648514297 is a wasteful number, since it uses less digits than its factorization.

648514297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733818.

The product of its digits is 483840, while the sum is 46.

The square root of 648514297 is about 25465.9438662697. The cubic root of 648514297 is about 865.5786151723.

The spelling of 648514297 in words is "six hundred forty-eight million, five hundred fourteen thousand, two hundred ninety-seven".