1649147 has 2 divisors, whose sum is σ = 1649148. Its totient is φ = 1649146.

The previous prime is 1649129. The next prime is 1649149. The reversal of 1649147 is 7419461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649147 is a prime.

Together with 1649149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1649149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824573 + 824574.

It is an arithmetic number, because the mean of its divisors is an integer number (824574).

2^1649147 is an apocalyptic number.

1649147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649147 is an equidigital number, since it uses as much as digits as its factorization.

1649147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 1649147 is about 1284.1911851434. The cubic root of 1649147 is about 118.1462086906.

The spelling of 1649147 in words is "one million, six hundred forty-nine thousand, one hundred forty-seven".