9181001 has 4 divisors (see below), whose sum is σ = 9272004. Its totient is φ = 9090000.

The previous prime is 9180989. The next prime is 9181013. The reversal of 9181001 is 1001819.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9180989) and next prime (9181013).

It can be written as a sum of positive squares in 2 ways, for example, as 5382400 + 3798601 = 2320^2 + 1949^2 .

It is not a de Polignac number, because 9181001 - 2¹⁸ = 8918857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9181021) 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, 45350 + ... + 45551.

It is an arithmetic number, because the mean of its divisors is an integer number (2318001).

Almost surely, 2^9181001 is an apocalyptic number.

It is an amenable number.

9181001 is a deficient number, since it is larger than the sum of its proper divisors (91003).

9181001 is a wasteful number, since it uses less digits than its factorization.

9181001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91002.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 9181001 is about 3030.0166666208. The cubic root of 9181001 is about 209.3935717097.

The spelling of 9181001 in words is "nine million, one hundred eighty-one thousand, one".