9781164 has 36 divisors (see below), whose sum is σ = 25801776. Its totient is φ = 3118368.

The previous prime is 9781157. The next prime is 9781183. The reversal of 9781164 is 4611879.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5079 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (716716).

Almost surely, 2^9781164 is an apocalyptic number.

It is an amenable number.

9781164 is an abundant number, since it is smaller than the sum of its proper divisors (16020612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9781164 is a wasteful number, since it uses less digits than its factorization.

9781164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11846 (or 11841 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 9781164 is about 3127.4852517638. The cubic root of 9781164 is about 213.8603042052.

The spelling of 9781164 in words is "nine million, seven hundred eighty-one thousand, one hundred sixty-four".