1649611 has 2 divisors, whose sum is σ = 1649612. Its totient is φ = 1649610.

The previous prime is 1649597. The next prime is 1649621. The reversal of 1649611 is 1169461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1649611 - 2⁹ = 1649099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649611.

It is not a weakly prime, because it can be changed into another prime (1649621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824805 + 824806.

It is an arithmetic number, because the mean of its divisors is an integer number (824806).

2^1649611 is an apocalyptic number.

1649611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649611 is an equidigital number, since it uses as much as digits as its factorization.

1649611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 1649611 is about 1284.3718308963. The cubic root of 1649611 is about 118.1572880951.

The spelling of 1649611 in words is "one million, six hundred forty-nine thousand, six hundred eleven".