648882931 has 8 divisors (see below), whose sum is σ = 653871600. Its totient is φ = 643903008.

The previous prime is 648882929. The next prime is 648882937. The reversal of 648882931 is 139288846.

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 648882931 - 2¹ = 648882929 is a prime.

It is a super-2 number, since 2×648882931² = 842098116286301522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648882937) 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 7 ways as a sum of consecutive naturals, for example, 265045 + ... + 267481.

It is an arithmetic number, because the mean of its divisors is an integer number (81733950).

Almost surely, 2^648882931 is an apocalyptic number.

648882931 is a deficient number, since it is larger than the sum of its proper divisors (4988669).

648882931 is a wasteful number, since it uses less digits than its factorization.

648882931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373.

The product of its digits is 663552, while the sum is 49.

The square root of 648882931 is about 25473.1806219797. The cubic root of 648882931 is about 865.7425906207.

The spelling of 648882931 in words is "six hundred forty-eight million, eight hundred eighty-two thousand, nine hundred thirty-one".