1649162897 has 2 divisors, whose sum is σ = 1649162898. Its totient is φ = 1649162896.

The previous prime is 1649162887. The next prime is 1649162903. The reversal of 1649162897 is 7982619461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 904746241 + 744416656 = 30079^2 + 27284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649162897 - 2⁶ = 1649162833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649162887) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824581448 + 824581449.

It is an arithmetic number, because the mean of its divisors is an integer number (824581449).

Almost surely, 2^1649162897 is an apocalyptic number.

It is an amenable number.

1649162897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649162897 is an equidigital number, since it uses as much as digits as its factorization.

1649162897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 1649162897 is about 40609.8866903122. The cubic root of 1649162897 is about 1181.4658831396.

The spelling of 1649162897 in words is "one billion, six hundred forty-nine million, one hundred sixty-two thousand, eight hundred ninety-seven".