650399669 has 2 divisors, whose sum is σ = 650399670. Its totient is φ = 650399668.

The previous prime is 650399627. The next prime is 650399699. The reversal of 650399669 is 966993056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584188900 + 66210769 = 24170^2 + 8137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650399669 is a prime.

It is a super-2 number, since 2×650399669² = 846039458870619122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650399669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650399699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325199834 + 325199835.

It is an arithmetic number, because the mean of its divisors is an integer number (325199835).

Almost surely, 2^650399669 is an apocalyptic number.

It is an amenable number.

650399669 is a deficient number, since it is larger than the sum of its proper divisors (1).

650399669 is an equidigital number, since it uses as much as digits as its factorization.

650399669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 650399669 is about 25502.9345174237. The cubic root of 650399669 is about 866.4166119987.

The spelling of 650399669 in words is "six hundred fifty million, three hundred ninety-nine thousand, six hundred sixty-nine".