1649285647 has 2 divisors, whose sum is σ = 1649285648. Its totient is φ = 1649285646.

The previous prime is 1649285563. The next prime is 1649285657. The reversal of 1649285647 is 7465829461.

It is a strong prime.

It is an emirp because it is prime and its reverse (7465829461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649285647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649285594 and 1649285603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649285657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824642823 + 824642824.

It is an arithmetic number, because the mean of its divisors is an integer number (824642824).

Almost surely, 2^1649285647 is an apocalyptic number.

1649285647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649285647 is an equidigital number, since it uses as much as digits as its factorization.

1649285647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The square root of 1649285647 is about 40611.3979936668. The cubic root of 1649285647 is about 1181.4951952509.

It can be divided in two parts, 1649 and 285647, that added together give a square (287296 = 536²).

The spelling of 1649285647 in words is "one billion, six hundred forty-nine million, two hundred eighty-five thousand, six hundred forty-seven".