650869 has 2 divisors, whose sum is σ = 650870. Its totient is φ = 650868.

The previous prime is 650863. The next prime is 650873. The reversal of 650869 is 968056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 70225 = 762^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 650869 - 2³ = 650861 is a prime.

It is a super-2 number, since 2×650869² = 847260910322, which contains 22 as substring.

650869 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650861) 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, 325434 + 325435.

It is an arithmetic number, because the mean of its divisors is an integer number (325435).

2⁶⁵⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

650869 is a deficient number, since it is larger than the sum of its proper divisors (1).

650869 is an equidigital number, since it uses as much as digits as its factorization.

650869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 650869 is about 806.7645257447. The cubic root of 650869 is about 86.6624965120.

The spelling of 650869 in words is "six hundred fifty thousand, eight hundred sixty-nine".