1648779983 has 2 divisors, whose sum is σ = 1648779984. Its totient is φ = 1648779982.

The previous prime is 1648779941. The next prime is 1648780009. The reversal of 1648779983 is 3899778461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1648779983 - 2¹⁰ = 1648778959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648779383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824389991 + 824389992.

It is an arithmetic number, because the mean of its divisors is an integer number (824389992).

Almost surely, 2^1648779983 is an apocalyptic number.

1648779983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648779983 is an equidigital number, since it uses as much as digits as its factorization.

1648779983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The square root of 1648779983 is about 40605.1718750210. The cubic root of 1648779983 is about 1181.3744357662.

The spelling of 1648779983 in words is "one billion, six hundred forty-eight million, seven hundred seventy-nine thousand, nine hundred eighty-three".