9554991 has 16 divisors (see below), whose sum is σ = 13315200. Its totient is φ = 6088608.

The previous prime is 9554989. The next prime is 9555017. The reversal of 9554991 is 1994559.

It is a happy number.

9554991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9554991 - 2¹ = 9554989 is a prime.

9554991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9554921) 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, 5820 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (832200).

Almost surely, 2^9554991 is an apocalyptic number.

9554991 is a deficient number, since it is larger than the sum of its proper divisors (3760209).

9554991 is a wasteful number, since it uses less digits than its factorization.

9554991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its digits is 72900, while the sum is 42.

The square root of 9554991 is about 3091.1148474296. The cubic root of 9554991 is about 212.1990461774.

The spelling of 9554991 in words is "nine million, five hundred fifty-four thousand, nine hundred ninety-one".