99271805 has 4 divisors (see below), whose sum is σ = 119126172. Its totient is φ = 79417440.

The previous prime is 99271793. The next prime is 99271813. The reversal of 99271805 is 50817299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50817299 = 13 ⋅3909023.

It can be written as a sum of positive squares in 2 ways, for example, as 19598329 + 79673476 = 4427^2 + 8926^2 .

It is not a de Polignac number, because 99271805 - 2⁶ = 99271741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9927176 + ... + 9927185.

It is an arithmetic number, because the mean of its divisors is an integer number (29781543).

Almost surely, 2^99271805 is an apocalyptic number.

It is an amenable number.

99271805 is a deficient number, since it is larger than the sum of its proper divisors (19854367).

99271805 is a wasteful number, since it uses less digits than its factorization.

99271805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19854366.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 99271805 is about 9963.5237240647. The cubic root of 99271805 is about 463.0294768881.

The spelling of 99271805 in words is "ninety-nine million, two hundred seventy-one thousand, eight hundred five".