648412931 has 2 divisors, whose sum is σ = 648412932. Its totient is φ = 648412930.

The previous prime is 648412903. The next prime is 648413011. The reversal of 648412931 is 139214846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648412931 - 2²⁶ = 581304067 is a prime.

It is a super-2 number, since 2×648412931² = 840878658176021522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648412631) 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 as a sum of consecutive naturals, namely, 324206465 + 324206466.

It is an arithmetic number, because the mean of its divisors is an integer number (324206466).

Almost surely, 2^648412931 is an apocalyptic number.

648412931 is a deficient number, since it is larger than the sum of its proper divisors (1).

648412931 is an equidigital number, since it uses as much as digits as its factorization.

648412931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 648412931 is about 25463.9535618490. The cubic root of 648412931 is about 865.5335147460.

The spelling of 648412931 in words is "six hundred forty-eight million, four hundred twelve thousand, nine hundred thirty-one".