9977816 has 16 divisors (see below), whose sum is σ = 18891600. Its totient is φ = 4940064.

The previous prime is 9977809. The next prime is 9977819. The reversal of 9977816 is 6187799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5231 + ... + 6878.

It is an arithmetic number, because the mean of its divisors is an integer number (1180725).

Almost surely, 2^9977816 is an apocalyptic number.

It is an amenable number.

9977816 is a deficient number, since it is larger than the sum of its proper divisors (8913784).

9977816 is a wasteful number, since it uses less digits than its factorization.

9977816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12218 (or 12214 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 9977816 is about 3158.7681143129. The cubic root of 9977816 is about 215.2840377871.

The spelling of 9977816 in words is "nine million, nine hundred seventy-seven thousand, eight hundred sixteen".