9977686 has 4 divisors (see below), whose sum is σ = 14966532. Its totient is φ = 4988842.

The previous prime is 9977683. The next prime is 9977741. The reversal of 9977686 is 6867799.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977683) 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 as a sum of consecutive naturals, namely, 2494420 + ... + 2494423.

It is an arithmetic number, because the mean of its divisors is an integer number (3741633).

Almost surely, 2^9977686 is an apocalyptic number.

9977686 is a deficient number, since it is larger than the sum of its proper divisors (4988846).

9977686 is a wasteful number, since it uses less digits than its factorization.

9977686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988845.

The product of its digits is 1143072, while the sum is 52.

The square root of 9977686 is about 3158.7475366037. The cubic root of 9977686 is about 215.2831028114.

The spelling of 9977686 in words is "nine million, nine hundred seventy-seven thousand, six hundred eighty-six".