649073 has 2 divisors, whose sum is σ = 649074. Its totient is φ = 649072.

The previous prime is 649069. The next prime is 649079. The reversal of 649073 is 370946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506944 + 142129 = 712^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 649073 - 2² = 649069 is a prime.

It is not a weakly prime, because it can be changed into another prime (649079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324536 + 324537.

It is an arithmetic number, because the mean of its divisors is an integer number (324537).

2⁶⁴⁹⁰⁷³ is an apocalyptic number.

It is an amenable number.

649073 is a deficient number, since it is larger than the sum of its proper divisors (1).

649073 is an equidigital number, since it uses as much as digits as its factorization.

649073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 649073 is about 805.6506687144. The cubic root of 649073 is about 86.5827112680.

The spelling of 649073 in words is "six hundred forty-nine thousand, seventy-three".