1649449 has 2 divisors, whose sum is σ = 1649450. Its totient is φ = 1649448.

The previous prime is 1649443. The next prime is 1649489. The reversal of 1649449 is 9449461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 257049 = 1180^2 + 507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1649443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824724 + 824725.

It is an arithmetic number, because the mean of its divisors is an integer number (824725).

2^1649449 is an apocalyptic number.

It is an amenable number.

1649449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649449 is an equidigital number, since it uses as much as digits as its factorization.

1649449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 1649449 is about 1284.3087634989. The cubic root of 1649449 is about 118.1534200908.

The spelling of 1649449 in words is "one million, six hundred forty-nine thousand, four hundred forty-nine".