9965553 has 16 divisors (see below), whose sum is σ = 15152256. Its totient is φ = 5771520.

The previous prime is 9965533. The next prime is 9965573. The reversal of 9965553 is 3555699.

9965553 is digitally balanced in base 2, because in such base 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 (9965533) and next prime (9965573).

It is not a de Polignac number, because 9965553 - 2¹⁴ = 9949169 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9965503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6853 + ... + 8178.

It is an arithmetic number, because the mean of its divisors is an integer number (947016).

Almost surely, 2^9965553 is an apocalyptic number.

It is an amenable number.

9965553 is a deficient number, since it is larger than the sum of its proper divisors (5186703).

9965553 is a wasteful number, since it uses less digits than its factorization.

9965553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15064.

The product of its digits is 182250, while the sum is 42.

The square root of 9965553 is about 3156.8264127126. The cubic root of 9965553 is about 215.1958050365.

The spelling of 9965553 in words is "nine million, nine hundred sixty-five thousand, five hundred fifty-three".