96921281 has 4 divisors (see below), whose sum is σ = 97538772. Its totient is φ = 96303792.

The previous prime is 96921257. The next prime is 96921311. The reversal of 96921281 is 18212969.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38551681 + 58369600 = 6209^2 + 7640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-96921281 is a prime.

It is a super-2 number, since 2×96921281² = 18787469421361922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96921481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308510 + ... + 308823.

It is an arithmetic number, because the mean of its divisors is an integer number (24384693).

Almost surely, 2^96921281 is an apocalyptic number.

It is an amenable number.

96921281 is a deficient number, since it is larger than the sum of its proper divisors (617491).

96921281 is a wasteful number, since it uses less digits than its factorization.

96921281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617490.

The product of its digits is 15552, while the sum is 38.

The square root of 96921281 is about 9844.8606389324. The cubic root of 96921281 is about 459.3457633976.

The spelling of 96921281 in words is "ninety-six million, nine hundred twenty-one thousand, two hundred eighty-one".