1649339 has 8 divisors (see below), whose sum is σ = 1697280. Its totient is φ = 1602216.

The previous prime is 1649327. The next prime is 1649341. The reversal of 1649339 is 9339461.

1649339 = 72² + 73² + ... + 174².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1649299 and 1649308.

It is not an unprimeable number, because it can be changed into a prime (1649309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (212160).

2^1649339 is an apocalyptic number.

1649339 is a deficient number, since it is larger than the sum of its proper divisors (47941).

1649339 is a wasteful number, since it uses less digits than its factorization.

1649339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 17496, while the sum is 35.

The square root of 1649339 is about 1284.2659381919. The cubic root of 1649339 is about 118.1507935238.

The spelling of 1649339 in words is "one million, six hundred forty-nine thousand, three hundred thirty-nine".