981323785 has 16 divisors (see below), whose sum is σ = 1270962000. Its totient is φ = 723075840.

The previous prime is 981323771. The next prime is 981323789. The reversal of 981323785 is 587323189.

981323785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 213978384 + 767345401 = 14628^2 + 27701^2 .

It is not a de Polignac number, because 981323785 - 2¹⁹ = 980799497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981323789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13591 + ... + 46339.

It is an arithmetic number, because the mean of its divisors is an integer number (79435125).

Almost surely, 2^981323785 is an apocalyptic number.

It is an amenable number.

981323785 is a deficient number, since it is larger than the sum of its proper divisors (289638215).

981323785 is a wasteful number, since it uses less digits than its factorization.

981323785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33228.

The product of its digits is 362880, while the sum is 46.

The square root of 981323785 is about 31326.0879300305. The cubic root of 981323785 is about 993.7354321401.

The spelling of 981323785 in words is "nine hundred eighty-one million, three hundred twenty-three thousand, seven hundred eighty-five".