9777985 has 32 divisors (see below), whose sum is σ = 14065920. Its totient is φ = 6386688.

The previous prime is 9777979. The next prime is 9778001. The reversal of 9777985 is 5897779.

It is not a de Polignac number, because 9777985 - 2⁹ = 9777473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109821 + ... + 109909.

It is an arithmetic number, because the mean of its divisors is an integer number (439560).

Almost surely, 2^9777985 is an apocalyptic number.

It is an amenable number.

9777985 is a deficient number, since it is larger than the sum of its proper divisors (4287935).

9777985 is a wasteful number, since it uses less digits than its factorization.

9777985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217.

The product of its digits is 1111320, while the sum is 52.

The square root of 9777985 is about 3126.9769746514. The cubic root of 9777985 is about 213.8371326081.

The spelling of 9777985 in words is "nine million, seven hundred seventy-seven thousand, nine hundred eighty-five".