1986134047 has 2 divisors, whose sum is σ = 1986134048. Its totient is φ = 1986134046.

The previous prime is 1986133967. The next prime is 1986134069. The reversal of 1986134047 is 7404316891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1986134047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1986133994 and 1986134012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986132047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993067023 + 993067024.

It is an arithmetic number, because the mean of its divisors is an integer number (993067024).

Almost surely, 2^1986134047 is an apocalyptic number.

1986134047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986134047 is an equidigital number, since it uses as much as digits as its factorization.

1986134047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1986134047 is about 44566.0638490769. The cubic root of 1986134047 is about 1257.0026273392.

The spelling of 1986134047 in words is "one billion, nine hundred eighty-six million, one hundred thirty-four thousand, forty-seven".