650687789 has 2 divisors, whose sum is σ = 650687790. Its totient is φ = 650687788.

The previous prime is 650687743. The next prime is 650687797. The reversal of 650687789 is 987786056.

It is a happy number.

650687789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505485289 + 145202500 = 22483^2 + 12050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650687789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650687689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325343894 + 325343895.

It is an arithmetic number, because the mean of its divisors is an integer number (325343895).

Almost surely, 2^650687789 is an apocalyptic number.

It is an amenable number.

650687789 is a deficient number, since it is larger than the sum of its proper divisors (1).

650687789 is an equidigital number, since it uses as much as digits as its factorization.

650687789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The square root of 650687789 is about 25508.5826536874. The cubic root of 650687789 is about 866.5445308327.

The spelling of 650687789 in words is "six hundred fifty million, six hundred eighty-seven thousand, seven hundred eighty-nine".