1649323 has 12 divisors (see below), whose sum is σ = 1891120. Its totient is φ = 1429632.

The previous prime is 1649311. The next prime is 1649327. The reversal of 1649323 is 3239461.

It is not a de Polignac number, because 1649323 - 2⁹ = 1648811 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (3888) is a multiple of the sum of its prime factors (486).

It is a junction number, because it is equal to n+sod(n) for n = 1649291 and 1649300.

It is not an unprimeable number, because it can be changed into a prime (1649327) 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 in 11 ways as a sum of consecutive naturals, for example, 3538 + ... + 3976.

2^1649323 is an apocalyptic number.

1649323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1649323 is a deficient number, since it is larger than the sum of its proper divisors (241797).

1649323 is a wasteful number, since it uses less digits than its factorization.

1649323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 469 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 1649323 is about 1284.2597089374. The cubic root of 1649323 is about 118.1504114680.

The spelling of 1649323 in words is "one million, six hundred forty-nine thousand, three hundred twenty-three".