1649233 has 4 divisors (see below), whose sum is σ = 1654848. Its totient is φ = 1643620.

The previous prime is 1649213. The next prime is 1649237. The reversal of 1649233 is 3329461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3329461 = 29 ⋅114809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649233 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1649237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341 + ... + 2962.

It is an arithmetic number, because the mean of its divisors is an integer number (413712).

2^1649233 is an apocalyptic number.

It is an amenable number.

1649233 is a deficient number, since it is larger than the sum of its proper divisors (5615).

1649233 is an equidigital number, since it uses as much as digits as its factorization.

1649233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614.

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

The square root of 1649233 is about 1284.2246688177. The cubic root of 1649233 is about 118.1482623578.

The spelling of 1649233 in words is "one million, six hundred forty-nine thousand, two hundred thirty-three".