648971299 has 4 divisors (see below), whose sum is σ = 649034680. Its totient is φ = 648907920.

The previous prime is 648971287. The next prime is 648971303. The reversal of 648971299 is 992179846.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 648971299 - 2⁷ = 648971171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648971399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12429 + ... + 38110.

It is an arithmetic number, because the mean of its divisors is an integer number (162258670).

Almost surely, 2^648971299 is an apocalyptic number.

648971299 is a deficient number, since it is larger than the sum of its proper divisors (63381).

648971299 is a wasteful number, since it uses less digits than its factorization.

648971299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63380.

The product of its digits is 1959552, while the sum is 55.

The square root of 648971299 is about 25474.9150930872. The cubic root of 648971299 is about 865.7818891675.

The spelling of 648971299 in words is "six hundred forty-eight million, nine hundred seventy-one thousand, two hundred ninety-nine".