9920655 has 24 divisors (see below), whose sum is σ = 17269200. Its totient is φ = 5268480.

The previous prime is 9920653. The next prime is 9920657. The reversal of 9920655 is 5560299.

9920655 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9920653) and next prime (9920657).

It is not a de Polignac number, because 9920655 - 2¹ = 9920653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19960 + ... + 20450.

It is an arithmetic number, because the mean of its divisors is an integer number (719550).

Almost surely, 2^9920655 is an apocalyptic number.

9920655 is a deficient number, since it is larger than the sum of its proper divisors (7348545).

9920655 is a wasteful number, since it uses less digits than its factorization.

9920655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 9920655 is about 3149.7071292423. The cubic root of 9920655 is about 214.8721431984.

The spelling of 9920655 in words is "nine million, nine hundred twenty thousand, six hundred fifty-five".