99271807 has 4 divisors (see below), whose sum is σ = 100954440. Its totient is φ = 97589176.

The previous prime is 99271793. The next prime is 99271813. The reversal of 99271807 is 70817299.

It is a happy number.

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 99271807 - 2¹⁵ = 99239039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99271817) 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, 841228 + ... + 841345.

It is an arithmetic number, because the mean of its divisors is an integer number (25238610).

Almost surely, 2^99271807 is an apocalyptic number.

99271807 is a deficient number, since it is larger than the sum of its proper divisors (1682633).

99271807 is a wasteful number, since it uses less digits than its factorization.

99271807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682632.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 99271807 is about 9963.5238244308. The cubic root of 99271807 is about 463.0294799976.

The spelling of 99271807 in words is "ninety-nine million, two hundred seventy-one thousand, eight hundred seven".