1649003 has 2 divisors, whose sum is σ = 1649004. Its totient is φ = 1649002.

The previous prime is 1648987. The next prime is 1649023. The reversal of 1649003 is 3009461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1649003 - 2⁴ = 1648987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649003.

It is not a weakly prime, because it can be changed into another prime (1649023) 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, 824501 + 824502.

It is an arithmetic number, because the mean of its divisors is an integer number (824502).

2^1649003 is an apocalyptic number.

1649003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649003 is an equidigital number, since it uses as much as digits as its factorization.

1649003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1649003 is about 1284.1351175013. The cubic root of 1649003 is about 118.1427698321.

The spelling of 1649003 in words is "one million, six hundred forty-nine thousand, three".