96721531 has 4 divisors (see below), whose sum is σ = 96749352. Its totient is φ = 96693712.

The previous prime is 96721523. The next prime is 96721553. The reversal of 96721531 is 13512769.

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

It is a cyclic number.

It is not a de Polignac number, because 96721531 - 2³ = 96721523 is a prime.

It is a super-2 number, since 2×96721531² = 18710109117967922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96721561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7801 + ... + 15946.

It is an arithmetic number, because the mean of its divisors is an integer number (24187338).

Almost surely, 2^96721531 is an apocalyptic number.

96721531 is a deficient number, since it is larger than the sum of its proper divisors (27821).

96721531 is a wasteful number, since it uses less digits than its factorization.

96721531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27820.

The product of its digits is 11340, while the sum is 34.

The square root of 96721531 is about 9834.7105193798. The cubic root of 96721531 is about 459.0299833430.

The spelling of 96721531 in words is "ninety-six million, seven hundred twenty-one thousand, five hundred thirty-one".