1986340047 has 12 divisors (see below), whose sum is σ = 2795183640. Its totient is φ = 1254529872.

The previous prime is 1986340043. The next prime is 1986340087. The reversal of 1986340047 is 7400436891.

It is not a de Polignac number, because 1986340047 - 2² = 1986340043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1986339990 and 1986340008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986340043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 915972 + ... + 918137.

It is an arithmetic number, because the mean of its divisors is an integer number (232931970).

Almost surely, 2^1986340047 is an apocalyptic number.

1986340047 is a deficient number, since it is larger than the sum of its proper divisors (808843593).

1986340047 is a wasteful number, since it uses less digits than its factorization.

1986340047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834150 (or 1834131 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1986340047 is about 44568.3749647662. The cubic root of 1986340047 is about 1257.0460842230.

The spelling of 1986340047 in words is "one billion, nine hundred eighty-six million, three hundred forty thousand, forty-seven".