1980396263 has 2 divisors, whose sum is σ = 1980396264. Its totient is φ = 1980396262.

The previous prime is 1980396211. The next prime is 1980396269. The reversal of 1980396263 is 3626930891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1980396263 - 2¹⁸ = 1980134119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980396269) 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, 990198131 + 990198132.

It is an arithmetic number, because the mean of its divisors is an integer number (990198132).

Almost surely, 2^1980396263 is an apocalyptic number.

1980396263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980396263 is an equidigital number, since it uses as much as digits as its factorization.

1980396263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 1980396263 is about 44501.6433741497. The cubic root of 1980396263 is about 1255.7909994697.

The spelling of 1980396263 in words is "one billion, nine hundred eighty million, three hundred ninety-six thousand, two hundred sixty-three".