1986853349 has 8 divisors (see below), whose sum is σ = 2158625112. Its totient is φ = 1817786880.

The previous prime is 1986853327. The next prime is 1986853357. The reversal of 1986853349 is 9433586891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42484324 + 1944369025 = 6518^2 + 44095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1986853349 - 2¹² = 1986849253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1986853294 and 1986853303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986853849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674792 + ... + 677729.

It is an arithmetic number, because the mean of its divisors is an integer number (269828139).

Almost surely, 2^1986853349 is an apocalyptic number.

It is an amenable number.

1986853349 is a deficient number, since it is larger than the sum of its proper divisors (171771763).

1986853349 is a wasteful number, since it uses less digits than its factorization.

1986853349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352647.

The product of its digits is 5598720, while the sum is 56.

The square root of 1986853349 is about 44574.1331828225. The cubic root of 1986853349 is about 1257.1543551604.

The spelling of 1986853349 in words is "one billion, nine hundred eighty-six million, eight hundred fifty-three thousand, three hundred forty-nine".