96721921 has 8 divisors (see below), whose sum is σ = 99104544. Its totient is φ = 94345440.

The previous prime is 96721903. The next prime is 96721939. The reversal of 96721921 is 12912769.

It is an interprime number because it is at equal distance from previous prime (96721903) and next prime (96721939).

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

It is not a de Polignac number, because 96721921 - 2²³ = 88333313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96721981) 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, 55341 + ... + 57061.

It is an arithmetic number, because the mean of its divisors is an integer number (12388068).

Almost surely, 2^96721921 is an apocalyptic number.

It is an amenable number.

96721921 is a deficient number, since it is larger than the sum of its proper divisors (2382623).

96721921 is a wasteful number, since it uses less digits than its factorization.

96721921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its digits is 13608, while the sum is 37.

The square root of 96721921 is about 9834.7303470914. The cubic root of 96721921 is about 459.0306003082.

The spelling of 96721921 in words is "ninety-six million, seven hundred twenty-one thousand, nine hundred twenty-one".