1986741694 has 16 divisors (see below), whose sum is σ = 3413719008. Its totient is φ = 849491712.

The previous prime is 1986741689. The next prime is 1986741697. The reversal of 1986741694 is 4961476891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986741697) 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 in 7 ways as a sum of consecutive naturals, for example, 157807 + ... + 169930.

It is an arithmetic number, because the mean of its divisors is an integer number (213357438).

Almost surely, 2^1986741694 is an apocalyptic number.

1986741694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1986741694 is a deficient number, since it is larger than the sum of its proper divisors (1426977314).

1986741694 is a wasteful number, since it uses less digits than its factorization.

1986741694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328179.

The product of its digits is 2612736, while the sum is 55.

The square root of 1986741694 is about 44572.8807011618. The cubic root of 1986741694 is about 1257.1308053265.

The spelling of 1986741694 in words is "one billion, nine hundred eighty-six million, seven hundred forty-one thousand, six hundred ninety-four".