919741985 has 16 divisors (see below), whose sum is σ = 1113210000. Its totient is φ = 729467136.

The previous prime is 919741969. The next prime is 919741997. The reversal of 919741985 is 589147919.

It can be written as a sum of positive squares in 8 ways, for example, as 125798656 + 793943329 = 11216^2 + 28177^2 .

It is a cyclic number.

It is not a de Polignac number, because 919741985 - 2⁴ = 919741969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592991 + ... + 594539.

It is an arithmetic number, because the mean of its divisors is an integer number (69575625).

Almost surely, 2^919741985 is an apocalyptic number.

It is an amenable number.

919741985 is a deficient number, since it is larger than the sum of its proper divisors (193468015).

919741985 is a wasteful number, since it uses less digits than its factorization.

919741985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its digits is 816480, while the sum is 53.

The square root of 919741985 is about 30327.2482266361. The cubic root of 919741985 is about 972.4978965201.

The spelling of 919741985 in words is "nine hundred nineteen million, seven hundred forty-one thousand, nine hundred eighty-five".