9681399 has 24 divisors (see below), whose sum is σ = 17212832. Its totient is φ = 5106240.

The previous prime is 9681361. The next prime is 9681401. The reversal of 9681399 is 9931869.

It is not a de Polignac number, because 9681399 - 2¹² = 9677303 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5092 + ... + 6729.

Almost surely, 2^9681399 is an apocalyptic number.

9681399 is a deficient number, since it is larger than the sum of its proper divisors (7531433).

9681399 is a wasteful number, since it uses less digits than its factorization.

9681399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11847 (or 11844 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9681399 is about 3111.4946569133. The cubic root of 9681399 is about 213.1307139216.

The spelling of 9681399 in words is "nine million, six hundred eighty-one thousand, three hundred ninety-nine".