99723271 has 4 divisors (see below), whose sum is σ = 99922032. Its totient is φ = 99524512.

The previous prime is 99723233. The next prime is 99723277. The reversal of 99723271 is 17232799.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99723271 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99723277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98626 + ... + 99631.

It is an arithmetic number, because the mean of its divisors is an integer number (24980508).

Almost surely, 2^99723271 is an apocalyptic number.

99723271 is a deficient number, since it is larger than the sum of its proper divisors (198761).

99723271 is a wasteful number, since it uses less digits than its factorization.

99723271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198760.

The product of its digits is 47628, while the sum is 40.

The square root of 99723271 is about 9986.1539643649. The cubic root of 99723271 is about 463.7303337320.

The spelling of 99723271 in words is "ninety-nine million, seven hundred twenty-three thousand, two hundred seventy-one".