9509491 has 4 divisors (see below), whose sum is σ = 9639832. Its totient is φ = 9379152.

The previous prime is 9509471. The next prime is 9509497. The reversal of 9509491 is 1949059.

9509491 is digitally balanced in base 3, because in such base 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: 1949059 = 7 ⋅278437.

It is a cyclic number.

It is not a de Polignac number, because 9509491 - 2⁷ = 9509363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9509491.

It is not an unprimeable number, because it can be changed into a prime (9509497) 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 3 ways as a sum of consecutive naturals, for example, 65061 + ... + 65206.

It is an arithmetic number, because the mean of its divisors is an integer number (2409958).

Almost surely, 2^9509491 is an apocalyptic number.

9509491 is a deficient number, since it is larger than the sum of its proper divisors (130341).

9509491 is a wasteful number, since it uses less digits than its factorization.

9509491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130340.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 9509491 is about 3083.7462606382. The cubic root of 9509491 is about 211.8616859163.

It can be divided in two parts, 9509 and 491, that added together give a 4-th power (10000 = 10⁴).

The spelling of 9509491 in words is "nine million, five hundred nine thousand, four hundred ninety-one".