9910921897 has 8 divisors (see below), whose sum is σ = 10025579520. Its totient is φ = 9796337760.

The previous prime is 9910921871. The next prime is 9910921963. The reversal of 9910921897 is 7981290199.

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 9910921897 - 2¹¹ = 9910919849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9910921847) 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, 280872 + ... + 314182.

It is an arithmetic number, because the mean of its divisors is an integer number (1253197440).

Almost surely, 2^9910921897 is an apocalyptic number.

It is an amenable number.

9910921897 is a deficient number, since it is larger than the sum of its proper divisors (114657623).

9910921897 is a wasteful number, since it uses less digits than its factorization.

9910921897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36743.

The product of its (nonzero) digits is 734832, while the sum is 55.

The square root of 9910921897 is about 99553.6131790303. The cubic root of 9910921897 is about 2148.0185022484.

The spelling of 9910921897 in words is "nine billion, nine hundred ten million, nine hundred twenty-one thousand, eight hundred ninety-seven".