1649471497 has 2 divisors, whose sum is σ = 1649471498. Its totient is φ = 1649471496.

The previous prime is 1649471429. The next prime is 1649471513. The reversal of 1649471497 is 7941749461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1340731456 + 308740041 = 36616^2 + 17571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649471497 - 2¹⁵ = 1649438729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649471297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824735748 + 824735749.

It is an arithmetic number, because the mean of its divisors is an integer number (824735749).

Almost surely, 2^1649471497 is an apocalyptic number.

It is an amenable number.

1649471497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649471497 is an equidigital number, since it uses as much as digits as its factorization.

1649471497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 1649471497 is about 40613.6860799411. The cubic root of 1649471497 is about 1181.5395725717.

The spelling of 1649471497 in words is "one billion, six hundred forty-nine million, four hundred seventy-one thousand, four hundred ninety-seven".