648795691 has 2 divisors, whose sum is σ = 648795692. Its totient is φ = 648795690.

The previous prime is 648795649. The next prime is 648795733. The reversal of 648795691 is 196597846.

It is a balanced prime because it is at equal distance from previous prime (648795649) and next prime (648795733).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648795691 is a prime.

It is a super-3 number, since 3×648795691³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (648795601) 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, 324397845 + 324397846.

It is an arithmetic number, because the mean of its divisors is an integer number (324397846).

Almost surely, 2^648795691 is an apocalyptic number.

648795691 is a deficient number, since it is larger than the sum of its proper divisors (1).

648795691 is an equidigital number, since it uses as much as digits as its factorization.

648795691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The square root of 648795691 is about 25471.4681751956. The cubic root of 648795691 is about 865.7037902121.

The spelling of 648795691 in words is "six hundred forty-eight million, seven hundred ninety-five thousand, six hundred ninety-one".