1998762793 has 2 divisors, whose sum is σ = 1998762794. Its totient is φ = 1998762792.

The previous prime is 1998762769. The next prime is 1998762797. The reversal of 1998762793 is 3972678991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1649334544 + 349428249 = 40612^2 + 18693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1998762793 - 2⁹ = 1998762281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1998762797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999381396 + 999381397.

It is an arithmetic number, because the mean of its divisors is an integer number (999381397).

Almost surely, 2^1998762793 is an apocalyptic number.

It is an amenable number.

1998762793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998762793 is an equidigital number, since it uses as much as digits as its factorization.

1998762793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 61.

The square root of 1998762793 is about 44707.5250153707. The cubic root of 1998762793 is about 1259.6611991156.

The spelling of 1998762793 in words is "one billion, nine hundred ninety-eight million, seven hundred sixty-two thousand, seven hundred ninety-three".