1992781023427 has 2 divisors, whose sum is σ = 1992781023428. Its totient is φ = 1992781023426.

The previous prime is 1992781023293. The next prime is 1992781023449. The reversal of 1992781023427 is 7243201872991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1992781023427 - 2¹⁵ = 1992780990659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1992781020427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996390511713 + 996390511714.

It is an arithmetic number, because the mean of its divisors is an integer number (996390511714).

Almost surely, 2^{1992781023427} is an apocalyptic number.

1992781023427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992781023427 is an equidigital number, since it uses as much as digits as its factorization.

1992781023427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 1992781023427 in words is "one trillion, nine hundred ninety-two billion, seven hundred eighty-one million, twenty-three thousand, four hundred twenty-seven".