9695406721 has 32 divisors (see below), whose sum is σ = 13211993088. Its totient is φ = 6869586240.

The previous prime is 9695406719. The next prime is 9695406757. The reversal of 9695406721 is 1276045969.

It is a happy number.

It is not a de Polignac number, because 9695406721 - 2¹ = 9695406719 is a prime.

It is a super-2 number, since 2×9695406721² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9695406781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5215 + ... + 139348.

It is an arithmetic number, because the mean of its divisors is an integer number (412874784).

Almost surely, 2^9695406721 is an apocalyptic number.

9695406721 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9695406721 is a deficient number, since it is larger than the sum of its proper divisors (3516586367).

9695406721 is a wasteful number, since it uses less digits than its factorization.

9695406721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144661.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 9695406721 is about 98465.2564156515. The cubic root of 9695406721 is about 2132.3345516349.

The spelling of 9695406721 in words is "nine billion, six hundred ninety-five million, four hundred six thousand, seven hundred twenty-one".