1992781023293 has 2 divisors, whose sum is σ = 1992781023294. Its totient is φ = 1992781023292.

The previous prime is 1992781023287. The next prime is 1992781023427. The reversal of 1992781023293 is 3923201872991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097073992569 + 895707030724 = 1047413^2 + 946418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1992781023293 - 2⁶ = 1992781023229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1992781023263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996390511646 + 996390511647.

It is an arithmetic number, because the mean of its divisors is an integer number (996390511647).

Almost surely, 2^{1992781023293} is an apocalyptic number.

It is an amenable number.

1992781023293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992781023293 is an equidigital number, since it uses as much as digits as its factorization.

1992781023293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 1992781023293 in words is "one trillion, nine hundred ninety-two billion, seven hundred eighty-one million, twenty-three thousand, two hundred ninety-three".