1649317837 has 2 divisors, whose sum is σ = 1649317838. Its totient is φ = 1649317836.

The previous prime is 1649317777. The next prime is 1649317853. The reversal of 1649317837 is 7387139461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1649253321 + 64516 = 40611^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649317837 - 2¹⁵ = 1649285069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649317037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824658918 + 824658919.

It is an arithmetic number, because the mean of its divisors is an integer number (824658919).

Almost surely, 2^1649317837 is an apocalyptic number.

It is an amenable number.

1649317837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649317837 is an equidigital number, since it uses as much as digits as its factorization.

1649317837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 1649317837 is about 40611.7943090428. The cubic root of 1649317837 is about 1181.5028818278.

The spelling of 1649317837 in words is "one billion, six hundred forty-nine million, three hundred seventeen thousand, eight hundred thirty-seven".