8910017921 has 8 divisors (see below), whose sum is σ = 10199825664. Its totient is φ = 7624447200.

The previous prime is 8910017911. The next prime is 8910017953. The reversal of 8910017921 is 1297100198.

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-8910017921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8910017911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054745 + ... + 1063158.

It is an arithmetic number, because the mean of its divisors is an integer number (1274978208).

Almost surely, 2^8910017921 is an apocalyptic number.

It is an amenable number.

8910017921 is a deficient number, since it is larger than the sum of its proper divisors (1289807743).

8910017921 is a wasteful number, since it uses less digits than its factorization.

8910017921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118511.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 8910017921 is about 94392.8912630607. The cubic root of 8910017921 is about 2073.1283589204.

The spelling of 8910017921 in words is "eight billion, nine hundred ten million, seventeen thousand, nine hundred twenty-one".