1986533485 has 4 divisors (see below), whose sum is σ = 2383840188. Its totient is φ = 1589226784.

The previous prime is 1986533459. The next prime is 1986533491. The reversal of 1986533485 is 5843356891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1379305321 + 607228164 = 37139^2 + 24642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1986533485 - 2¹⁷ = 1986402413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198653344 + ... + 198653353.

It is an arithmetic number, because the mean of its divisors is an integer number (595960047).

Almost surely, 2^1986533485 is an apocalyptic number.

It is an amenable number.

1986533485 is a deficient number, since it is larger than the sum of its proper divisors (397306703).

1986533485 is an equidigital number, since it uses as much as digits as its factorization.

1986533485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397306702.

The product of its digits is 3110400, while the sum is 52.

The square root of 1986533485 is about 44570.5450381752. The cubic root of 1986533485 is about 1257.0868883454.

The spelling of 1986533485 in words is "one billion, nine hundred eighty-six million, five hundred thirty-three thousand, four hundred eighty-five".