650078669 has 2 divisors, whose sum is σ = 650078670. Its totient is φ = 650078668.

The previous prime is 650078633. The next prime is 650078677. The reversal of 650078669 is 966870056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640849225 + 9229444 = 25315^2 + 3038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650078669 is a prime.

It is a super-2 number, since 2×650078669² = 845204551777623122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650078699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325039334 + 325039335.

It is an arithmetic number, because the mean of its divisors is an integer number (325039335).

Almost surely, 2^650078669 is an apocalyptic number.

It is an amenable number.

650078669 is a deficient number, since it is larger than the sum of its proper divisors (1).

650078669 is an equidigital number, since it uses as much as digits as its factorization.

650078669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 650078669 is about 25496.6403473085. The cubic root of 650078669 is about 866.2740506820.

The spelling of 650078669 in words is "six hundred fifty million, seventy-eight thousand, six hundred sixty-nine".