649793 has 2 divisors, whose sum is σ = 649794. Its totient is φ = 649792.

The previous prime is 649787. The next prime is 649799. The reversal of 649793 is 397946.

It is a balanced prime because it is at equal distance from previous prime (649787) and next prime (649799).

It can be written as a sum of positive squares in only one way, i.e., 588289 + 61504 = 767^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 649793 - 2⁴ = 649777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324896 + 324897.

It is an arithmetic number, because the mean of its divisors is an integer number (324897).

2⁶⁴⁹⁷⁹³ is an apocalyptic number.

It is an amenable number.

649793 is a deficient number, since it is larger than the sum of its proper divisors (1).

649793 is an equidigital number, since it uses as much as digits as its factorization.

649793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 649793 is about 806.0973886572. The cubic root of 649793 is about 86.6147140965.

The spelling of 649793 in words is "six hundred forty-nine thousand, seven hundred ninety-three".