9629907121 has 16 divisors (see below), whose sum is σ = 9844453584. Its totient is φ = 9418235904.

The previous prime is 9629907113. The next prime is 9629907137. The reversal of 9629907121 is 1217099269.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 69956496 + 9559950625 = 8364^2 + 97775^2 .

It is a cyclic number.

It is not a de Polignac number, because 9629907121 - 2³ = 9629907113 is a prime.

It is a super-2 number, since 2×9629907121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9629907151) 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, 4350411 + ... + 4352623.

It is an arithmetic number, because the mean of its divisors is an integer number (615278349).

Almost surely, 2^9629907121 is an apocalyptic number.

It is an amenable number.

9629907121 is a deficient number, since it is larger than the sum of its proper divisors (214546463).

9629907121 is a wasteful number, since it uses less digits than its factorization.

9629907121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 9629907121 is about 98132.0901693223. The cubic root of 9629907121 is about 2127.5218684093.

The spelling of 9629907121 in words is "nine billion, six hundred twenty-nine million, nine hundred seven thousand, one hundred twenty-one".