9400081 has 4 divisors (see below), whose sum is σ = 9414964. Its totient is φ = 9385200.

The previous prime is 9400073. The next prime is 9400087. The reversal of 9400081 is 1800049.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6969600 + 2430481 = 2640^2 + 1559^2 .

It is a cyclic number.

It is not a de Polignac number, because 9400081 - 2³ = 9400073 is a prime.

It is a super-2 number, since 2×9400081² = 176723045613122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9400087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450 + ... + 7771.

It is an arithmetic number, because the mean of its divisors is an integer number (2353741).

Almost surely, 2^9400081 is an apocalyptic number.

It is an amenable number.

9400081 is a deficient number, since it is larger than the sum of its proper divisors (14883).

9400081 is a wasteful number, since it uses less digits than its factorization.

9400081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14882.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 9400081 is about 3065.9551529662. The cubic root of 9400081 is about 211.0460356416.

The spelling of 9400081 in words is "nine million, four hundred thousand, eighty-one".