649907 has 2 divisors, whose sum is σ = 649908. Its totient is φ = 649906.

The previous prime is 649897. The next prime is 649921. The reversal of 649907 is 709946.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649907 - 2⁶ = 649843 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (649937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324953 + 324954.

It is an arithmetic number, because the mean of its divisors is an integer number (324954).

2⁶⁴⁹⁹⁰⁷ is an apocalyptic number.

649907 is a deficient number, since it is larger than the sum of its proper divisors (1).

649907 is an equidigital number, since it uses as much as digits as its factorization.

649907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 649907 is about 806.1680966151. The cubic root of 649907 is about 86.6197790428.

The spelling of 649907 in words is "six hundred forty-nine thousand, nine hundred seven".