1649303 has 2 divisors, whose sum is σ = 1649304. Its totient is φ = 1649302.

The previous prime is 1649299. The next prime is 1649309. The reversal of 1649303 is 3039461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1649303 - 2² = 1649299 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824651 + 824652.

It is an arithmetic number, because the mean of its divisors is an integer number (824652).

2^1649303 is an apocalyptic number.

1649303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649303 is an equidigital number, since it uses as much as digits as its factorization.

1649303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1649303 is about 1284.2519223268. The cubic root of 1649303 is about 118.1499338947.

The spelling of 1649303 in words is "one million, six hundred forty-nine thousand, three hundred three".