1986712999 has 2 divisors, whose sum is σ = 1986713000. Its totient is φ = 1986712998.

The previous prime is 1986712997. The next prime is 1986713051. The reversal of 1986712999 is 9992176891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1986712999 - 2¹ = 1986712997 is a prime.

Together with 1986712997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986712991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993356499 + 993356500.

It is an arithmetic number, because the mean of its divisors is an integer number (993356500).

Almost surely, 2^1986712999 is an apocalyptic number.

1986712999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986712999 is an equidigital number, since it uses as much as digits as its factorization.

1986712999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 61.

The square root of 1986712999 is about 44572.5588114481. The cubic root of 1986712999 is about 1257.1247529473.

The spelling of 1986712999 in words is "one billion, nine hundred eighty-six million, seven hundred twelve thousand, nine hundred ninety-nine".