650669 has 2 divisors, whose sum is σ = 650670. Its totient is φ = 650668.

The previous prime is 650627. The next prime is 650701. The reversal of 650669 is 966056.

It is an a-pointer prime, because the next prime (650701) can be obtained adding 650669 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 26569 = 790^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 650669 - 2⁸ = 650413 is a prime.

It is a super-2 number, since 2×650669² = 846740295122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325334 + 325335.

It is an arithmetic number, because the mean of its divisors is an integer number (325335).

2⁶⁵⁰⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

650669 is a deficient number, since it is larger than the sum of its proper divisors (1).

650669 is an equidigital number, since it uses as much as digits as its factorization.

650669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 650669 is about 806.6405643160. The cubic root of 650669 is about 86.6536190088.

The spelling of 650669 in words is "six hundred fifty thousand, six hundred sixty-nine".