1649783743 has 2 divisors, whose sum is σ = 1649783744. Its totient is φ = 1649783742.

The previous prime is 1649783741. The next prime is 1649783747. The reversal of 1649783743 is 3473879461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1649783743 - 2¹ = 1649783741 is a prime.

Together with 1649783741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649783741) 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, 824891871 + 824891872.

It is an arithmetic number, because the mean of its divisors is an integer number (824891872).

Almost surely, 2^1649783743 is an apocalyptic number.

1649783743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649783743 is an equidigital number, since it uses as much as digits as its factorization.

1649783743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 52.

The square root of 1649783743 is about 40617.5299962959. The cubic root of 1649783743 is about 1181.6141232644.

The spelling of 1649783743 in words is "one billion, six hundred forty-nine million, seven hundred eighty-three thousand, seven hundred forty-three".