1986712919 has 2 divisors, whose sum is σ = 1986712920. Its totient is φ = 1986712918.

The previous prime is 1986712829. The next prime is 1986712957. The reversal of 1986712919 is 9192176891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1986712919 is a prime.

It is a super-2 number, since 2×1986712919² = 7894056445043001122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986712999) 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, 993356459 + 993356460.

It is an arithmetic number, because the mean of its divisors is an integer number (993356460).

Almost surely, 2^1986712919 is an apocalyptic number.

1986712919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986712919 is an equidigital number, since it uses as much as digits as its factorization.

1986712919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 53.

The square root of 1986712919 is about 44572.5579140350. The cubic root of 1986712919 is about 1257.1247360735.

The spelling of 1986712919 in words is "one billion, nine hundred eighty-six million, seven hundred twelve thousand, nine hundred nineteen".