9665381 has 16 divisors (see below), whose sum is σ = 11188800. Its totient is φ = 8265600.

The previous prime is 9665377. The next prime is 9665387. The reversal of 9665381 is 1835669.

It is not a de Polignac number, because 9665381 - 2² = 9665377 is a prime.

It is a super-2 number, since 2×9665381² = 186839179750322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665387) 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, 12710 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (699300).

Almost surely, 2^9665381 is an apocalyptic number.

It is an amenable number.

9665381 is a deficient number, since it is larger than the sum of its proper divisors (1523419).

9665381 is a wasteful number, since it uses less digits than its factorization.

9665381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 38880, while the sum is 38.

The square root of 9665381 is about 3108.9195872521. The cubic root of 9665381 is about 213.0131065282.

The spelling of 9665381 in words is "nine million, six hundred sixty-five thousand, three hundred eighty-one".