9720887 has 16 divisors (see below), whose sum is σ = 11335680. Its totient is φ = 8248800.

The previous prime is 9720883. The next prime is 9720901. The reversal of 9720887 is 7880279.

It is a cyclic number.

It is not a de Polignac number, because 9720887 - 2² = 9720883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9398 + ... + 10380.

It is an arithmetic number, because the mean of its divisors is an integer number (708480).

Almost surely, 2^9720887 is an apocalyptic number.

9720887 is a deficient number, since it is larger than the sum of its proper divisors (1614793).

9720887 is a wasteful number, since it uses less digits than its factorization.

9720887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 9720887 is about 3117.8337030701. The cubic root of 9720887 is about 213.4200897682.

The spelling of 9720887 in words is "nine million, seven hundred twenty thousand, eight hundred eighty-seven".