1986745979047 has 2 divisors, whose sum is σ = 1986745979048. Its totient is φ = 1986745979046.

The previous prime is 1986745978991. The next prime is 1986745979083. The reversal of 1986745979047 is 7409795476891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1986745979047 - 2²⁷ = 1986611761319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986745979147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993372989523 + 993372989524.

It is an arithmetic number, because the mean of its divisors is an integer number (993372989524).

Almost surely, 2^{1986745979047} is an apocalyptic number.

1986745979047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986745979047 is an equidigital number, since it uses as much as digits as its factorization.

1986745979047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960180480, while the sum is 76.

The spelling of 1986745979047 in words is "one trillion, nine hundred eighty-six billion, seven hundred forty-five million, nine hundred seventy-nine thousand, forty-seven".