9555591 has 4 divisors (see below), whose sum is σ = 12740792. Its totient is φ = 6370392.

The previous prime is 9555569. The next prime is 9555593. The reversal of 9555591 is 1955559.

It is a happy number.

9555591 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 a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1955559 = 3 ⋅651853.

It is not a de Polignac number, because 9555591 - 2⁶ = 9555527 is a prime.

It is a Duffinian number.

9555591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9555593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1592596 + ... + 1592601.

It is an arithmetic number, because the mean of its divisors is an integer number (3185198).

Almost surely, 2^9555591 is an apocalyptic number.

9555591 is a deficient number, since it is larger than the sum of its proper divisors (3185201).

9555591 is a wasteful number, since it uses less digits than its factorization.

9555591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185200.

The product of its digits is 50625, while the sum is 39.

The square root of 9555591 is about 3091.2118982690. The cubic root of 9555591 is about 212.2034877222.

The spelling of 9555591 in words is "nine million, five hundred fifty-five thousand, five hundred ninety-one".