1649383679 has 2 divisors, whose sum is σ = 1649383680. Its totient is φ = 1649383678.

The previous prime is 1649383657. The next prime is 1649383699. The reversal of 1649383679 is 9763839461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649383679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649383609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824691839 + 824691840.

It is an arithmetic number, because the mean of its divisors is an integer number (824691840).

Almost surely, 2^1649383679 is an apocalyptic number.

1649383679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649383679 is an equidigital number, since it uses as much as digits as its factorization.

1649383679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 56.

The square root of 1649383679 is about 40612.6049275345. The cubic root of 1649383679 is about 1181.5186037778.

The spelling of 1649383679 in words is "one billion, six hundred forty-nine million, three hundred eighty-three thousand, six hundred seventy-nine".