649361 has 2 divisors, whose sum is σ = 649362. Its totient is φ = 649360.

The previous prime is 649321. The next prime is 649379. The reversal of 649361 is 163946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 101761 = 740^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 649361 - 2¹⁴ = 632977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649361.

It is not a weakly prime, because it can be changed into another prime (649321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324680 + 324681.

It is an arithmetic number, because the mean of its divisors is an integer number (324681).

2⁶⁴⁹³⁶¹ is an apocalyptic number.

It is an amenable number.

649361 is a deficient number, since it is larger than the sum of its proper divisors (1).

649361 is an equidigital number, since it uses as much as digits as its factorization.

649361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 649361 is about 805.8293864088. The cubic root of 649361 is about 86.5955152380.

The spelling of 649361 in words is "six hundred forty-nine thousand, three hundred sixty-one".