9935749121 has 8 divisors (see below), whose sum is σ = 10101993504. Its totient is φ = 9770032800.

The previous prime is 9935749037. The next prime is 9935749123. The reversal of 9935749121 is 1219475399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9935749121 is a prime.

It is a super-2 number, since 2×9935749121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9935749121.

It is not an unprimeable number, because it can be changed into a prime (9935749123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93980 + ... + 169421.

It is an arithmetic number, because the mean of its divisors is an integer number (1262749188).

Almost surely, 2^9935749121 is an apocalyptic number.

It is an amenable number.

9935749121 is a deficient number, since it is larger than the sum of its proper divisors (166244383).

9935749121 is a wasteful number, since it uses less digits than its factorization.

9935749121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264031.

The product of its digits is 612360, while the sum is 50.

The square root of 9935749121 is about 99678.2279186383. The cubic root of 9935749121 is about 2149.8106284261.

The spelling of 9935749121 in words is "nine billion, nine hundred thirty-five million, seven hundred forty-nine thousand, one hundred twenty-one".