648245677 has 2 divisors, whose sum is σ = 648245678. Its totient is φ = 648245676.

The previous prime is 648245623. The next prime is 648245699. The reversal of 648245677 is 776542846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643839876 + 4405801 = 25374^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 648245677 - 2¹⁵ = 648212909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648245677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648249677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324122838 + 324122839.

It is an arithmetic number, because the mean of its divisors is an integer number (324122839).

Almost surely, 2^648245677 is an apocalyptic number.

It is an amenable number.

648245677 is a deficient number, since it is larger than the sum of its proper divisors (1).

648245677 is an equidigital number, since it uses as much as digits as its factorization.

648245677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 49.

The square root of 648245677 is about 25460.6692174420. The cubic root of 648245677 is about 865.4590887209.

The spelling of 648245677 in words is "six hundred forty-eight million, two hundred forty-five thousand, six hundred seventy-seven".