9487891 has 16 divisors (see below), whose sum is σ = 11685888. Its totient is φ = 7524000.

The previous prime is 9487871. The next prime is 9487913. The reversal of 9487891 is 1987849.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9487891 - 2⁷ = 9487763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9487811) 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, 4041 + ... + 5941.

It is an arithmetic number, because the mean of its divisors is an integer number (730368).

Almost surely, 2^9487891 is an apocalyptic number.

9487891 is a deficient number, since it is larger than the sum of its proper divisors (2197997).

9487891 is a wasteful number, since it uses less digits than its factorization.

9487891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962.

The product of its digits is 145152, while the sum is 46.

The square root of 9487891 is about 3080.2420359446. The cubic root of 9487891 is about 211.7011557112.

The spelling of 9487891 in words is "nine million, four hundred eighty-seven thousand, eight hundred ninety-one".