96721 has 3 divisors (see below), whose sum is σ = 97033. Its totient is φ = 96410.

The previous prime is 96703. The next prime is 96731. The reversal of 96721 is 12769.

96721 = T₃₁₀ + T₃₁₁.

The square root of 96721 is 311.

It is a perfect power (a square), and thus also a powerful number.

96721 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12769 = 113².

It is a de Polignac number, because none of the positive numbers 2^k-96721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 156 + ... + 466.

2⁹⁶⁷²¹ is an apocalyptic number.

96721 is the 311-st square number.

96721 is the 156-th centered octagonal number.

It is an amenable number.

96721 is a deficient number, since it is larger than the sum of its proper divisors (312).

96721 is an frugal number, since it uses more digits than its factorization.

96721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 311 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The cubic root of 96721 is about 45.9029143318.

Multiplying 96721 by its sum of digits (25), we get a square (2418025 = 1555²).

Multiplying 96721 by its reverse (12769), we get a square (1235030449 = 35143²).

The spelling of 96721 in words is "ninety-six thousand, seven hundred twenty-one".