9409681 has 4 divisors (see below), whose sum is σ = 9550192. Its totient is φ = 9269172.

The previous prime is 9409667. The next prime is 9409711. The reversal of 9409681 is 1869049.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9409681 - 2⁵ = 9409649 is a prime.

It is a super-2 number, since 2×9409681² = 177084193043522, which contains 22 as substring.

It is a Duffinian number.

9409681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9409681.

It is not an unprimeable number, because it can be changed into a prime (9409651) 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, 70155 + ... + 70288.

It is an arithmetic number, because the mean of its divisors is an integer number (2387548).

Almost surely, 2^9409681 is an apocalyptic number.

It is an amenable number.

9409681 is a deficient number, since it is larger than the sum of its proper divisors (140511).

9409681 is a wasteful number, since it uses less digits than its factorization.

9409681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140510.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 9409681 is about 3067.5203340809. The cubic root of 9409681 is about 211.1178560377.

The spelling of 9409681 in words is "nine million, four hundred nine thousand, six hundred eighty-one".