9939101281 has 8 divisors (see below), whose sum is σ = 9990331520. Its totient is φ = 9887939568.

The previous prime is 9939101231. The next prime is 9939101317. The reversal of 9939101281 is 1821019399.

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

It is a cyclic number.

It is not a de Polignac number, because 9939101281 - 2¹³ = 9939093089 is a prime.

It is a super-2 number, since 2×9939101281² (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 (9939101201) 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, 287530 + ... + 320236.

It is an arithmetic number, because the mean of its divisors is an integer number (1248791440).

Almost surely, 2^9939101281 is an apocalyptic number.

It is an amenable number.

9939101281 is a deficient number, since it is larger than the sum of its proper divisors (51230239).

9939101281 is a wasteful number, since it uses less digits than its factorization.

9939101281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34263.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 9939101281 is about 99695.0414062806. The cubic root of 9939101281 is about 2150.0523716105.

The spelling of 9939101281 in words is "nine billion, nine hundred thirty-nine million, one hundred one thousand, two hundred eighty-one".