981723785 has 16 divisors (see below), whose sum is σ = 1347220992. Its totient is φ = 672753600.

The previous prime is 981723767. The next prime is 981723817. The reversal of 981723785 is 587327189.

981723785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 981723785 - 2⁸ = 981723529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52880 + ... + 68990.

It is an arithmetic number, because the mean of its divisors is an integer number (84201312).

Almost surely, 2^981723785 is an apocalyptic number.

It is an amenable number.

981723785 is a deficient number, since it is larger than the sum of its proper divisors (365497207).

981723785 is a wasteful number, since it uses less digits than its factorization.

981723785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17864.

The product of its digits is 846720, while the sum is 50.

The square root of 981723785 is about 31332.4717346079. The cubic root of 981723785 is about 993.8704335139.

The spelling of 981723785 in words is "nine hundred eighty-one million, seven hundred twenty-three thousand, seven hundred eighty-five".