649069 has 2 divisors, whose sum is σ = 649070. Its totient is φ = 649068.

The previous prime is 649063. The next prime is 649073. The reversal of 649069 is 960946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 56169 = 770^2 + 237^2 .

It is a cyclic number.

It is not a de Polignac number, because 649069 - 2¹⁹ = 124781 is a prime.

It is a super-2 number, since 2×649069² = 842581133522, which contains 22 as substring.

649069 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649063) 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, 324534 + 324535.

It is an arithmetic number, because the mean of its divisors is an integer number (324535).

2⁶⁴⁹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

649069 is a deficient number, since it is larger than the sum of its proper divisors (1).

649069 is an equidigital number, since it uses as much as digits as its factorization.

649069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 649069 is about 805.6481862451. The cubic root of 649069 is about 86.5825334084.

The spelling of 649069 in words is "six hundred forty-nine thousand, sixty-nine".