9699681 has 4 divisors (see below), whose sum is σ = 12932912. Its totient is φ = 6466452.

The previous prime is 9699667. The next prime is 9699713. The reversal of 9699681 is 1869969.

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 not a de Polignac number, because 9699681 - 2⁵ = 9699649 is a prime.

It is a super-2 number, since 2×9699681² = 188167623003522, which contains 22 as substring.

It is a Duffinian number.

9699681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9699681.

It is not an unprimeable number, because it can be changed into a prime (9699611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616611 + ... + 1616616.

It is an arithmetic number, because the mean of its divisors is an integer number (3233228).

Almost surely, 2^9699681 is an apocalyptic number.

It is an amenable number.

9699681 is a deficient number, since it is larger than the sum of its proper divisors (3233231).

9699681 is a wasteful number, since it uses less digits than its factorization.

9699681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233230.

The product of its digits is 209952, while the sum is 48.

The square root of 9699681 is about 3114.4310876948. The cubic root of 9699681 is about 213.2647856482.

It can be divided in two parts, 969968 and 1, that added together give a palindrome (969969).

The spelling of 9699681 in words is "nine million, six hundred ninety-nine thousand, six hundred eighty-one".