648796957 has 2 divisors, whose sum is σ = 648796958. Its totient is φ = 648796956.

The previous prime is 648796931. The next prime is 648796969. The reversal of 648796957 is 759697846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558565956 + 90231001 = 23634^2 + 9499^2 .

It is a cyclic number.

It is not a de Polignac number, because 648796957 - 2⁷ = 648796829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648796895 and 648796904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648796927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324398478 + 324398479.

It is an arithmetic number, because the mean of its divisors is an integer number (324398479).

Almost surely, 2^648796957 is an apocalyptic number.

It is an amenable number.

648796957 is a deficient number, since it is larger than the sum of its proper divisors (1).

648796957 is an equidigital number, since it uses as much as digits as its factorization.

648796957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 61.

The square root of 648796957 is about 25471.4930265189. The cubic root of 648796957 is about 865.7043532965.

The spelling of 648796957 in words is "six hundred forty-eight million, seven hundred ninety-six thousand, nine hundred fifty-seven".