648693379 has 2 divisors, whose sum is σ = 648693380. Its totient is φ = 648693378.

The previous prime is 648693347. The next prime is 648693391. The reversal of 648693379 is 973396846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648693379 - 2⁵ = 648693347 is a prime.

It is not a weakly prime, because it can be changed into another prime (648693319) 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 as a sum of consecutive naturals, namely, 324346689 + 324346690.

It is an arithmetic number, because the mean of its divisors is an integer number (324346690).

Almost surely, 2^648693379 is an apocalyptic number.

648693379 is a deficient number, since it is larger than the sum of its proper divisors (1).

648693379 is an equidigital number, since it uses as much as digits as its factorization.

648693379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 55.

The square root of 648693379 is about 25469.4597312153. The cubic root of 648693379 is about 865.6582820274.

The spelling of 648693379 in words is "six hundred forty-eight million, six hundred ninety-three thousand, three hundred seventy-nine".