1985733313 has 4 divisors (see below), whose sum is σ = 2072069568. Its totient is φ = 1899397060.

The previous prime is 1985733311. The next prime is 1985733317. The reversal of 1985733313 is 3133375891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1985733313 - 2¹ = 1985733311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985733313.

It is not an unprimeable number, because it can be changed into a prime (1985733311) 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 3 ways as a sum of consecutive naturals, for example, 43168093 + ... + 43168138.

It is an arithmetic number, because the mean of its divisors is an integer number (518017392).

Almost surely, 2^1985733313 is an apocalyptic number.

It is an amenable number.

1985733313 is a deficient number, since it is larger than the sum of its proper divisors (86336255).

1985733313 is an equidigital number, since it uses as much as digits as its factorization.

1985733313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86336254.

The product of its digits is 204120, while the sum is 43.

The square root of 1985733313 is about 44561.5676676663. The cubic root of 1985733313 is about 1256.9180815900.

The spelling of 1985733313 in words is "one billion, nine hundred eighty-five million, seven hundred thirty-three thousand, three hundred thirteen".