1903042985 has 8 divisors (see below), whose sum is σ = 2417984136. Its totient is φ = 1432879360.

The previous prime is 1903042969. The next prime is 1903042987. The reversal of 1903042985 is 5892403091.

It can be written as a sum of positive squares in 4 ways, for example, as 551451289 + 1351591696 = 23483^2 + 36764^2 .

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

It is not a de Polignac number, because 1903042985 - 2⁴ = 1903042969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1903042987) 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, 11194286 + ... + 11194455.

It is an arithmetic number, because the mean of its divisors is an integer number (302248017).

Almost surely, 2^1903042985 is an apocalyptic number.

It is an amenable number.

1903042985 is a deficient number, since it is larger than the sum of its proper divisors (514941151).

1903042985 is a wasteful number, since it uses less digits than its factorization.

1903042985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22388763.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1903042985 is about 43623.8809025515. The cubic root of 1903042985 is about 1239.2231921409.

The spelling of 1903042985 in words is "one billion, nine hundred three million, forty-two thousand, nine hundred eighty-five".