99999999989783 has 2 divisors, whose sum is σ = 99999999989784. Its totient is φ = 99999999989782.

The previous prime is 99999999989779. The next prime is 99999999989881. The reversal of 99999999989783 is 38798999999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99999999989783 - 2² = 99999999989779 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999999919783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999999994891 + 49999999994892.

It is an arithmetic number, because the mean of its divisors is an integer number (49999999994892).

Almost surely, 2^{99999999989783} is an apocalyptic number.

99999999989783 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999999989783 is an equidigital number, since it uses as much as digits as its factorization.

99999999989783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4686238234944, while the sum is 116.

The spelling of 99999999989783 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred eighty-nine thousand, seven hundred eighty-three".