1649828923 has 2 divisors, whose sum is σ = 1649828924. Its totient is φ = 1649828922.

The previous prime is 1649828909. The next prime is 1649828941. The reversal of 1649828923 is 3298289461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649828923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649828993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824914461 + 824914462.

It is an arithmetic number, because the mean of its divisors is an integer number (824914462).

Almost surely, 2^1649828923 is an apocalyptic number.

1649828923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649828923 is an equidigital number, since it uses as much as digits as its factorization.

1649828923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 52.

The square root of 1649828923 is about 40618.0861562925. The cubic root of 1649828923 is about 1181.6249094940.

The spelling of 1649828923 in words is "one billion, six hundred forty-nine million, eight hundred twenty-eight thousand, nine hundred twenty-three".