99265721 has 4 divisors (see below), whose sum is σ = 99550500. Its totient is φ = 98980944.

The previous prime is 99265667. The next prime is 99265741. The reversal of 99265721 is 12756299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12756299 = 349 ⋅36551.

It can be written as a sum of positive squares in 2 ways, for example, as 29041321 + 70224400 = 5389^2 + 8380^2 .

It is a cyclic number.

It is not a de Polignac number, because 99265721 - 2⁶ = 99265657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99265741) 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, 141866 + ... + 142563.

It is an arithmetic number, because the mean of its divisors is an integer number (24887625).

Almost surely, 2^99265721 is an apocalyptic number.

It is an amenable number.

99265721 is a deficient number, since it is larger than the sum of its proper divisors (284779).

99265721 is a wasteful number, since it uses less digits than its factorization.

99265721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284778.

The product of its digits is 68040, while the sum is 41.

The square root of 99265721 is about 9963.2184057161. The cubic root of 99265721 is about 463.0200175763.

The spelling of 99265721 in words is "ninety-nine million, two hundred sixty-five thousand, seven hundred twenty-one".