99539071 has 4 divisors (see below), whose sum is σ = 99594144. Its totient is φ = 99484000.

The previous prime is 99539059. The next prime is 99539087. The reversal of 99539071 is 17093599.

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 99539071 - 2⁹ = 99538559 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 (99539051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24730 + ... + 28471.

It is an arithmetic number, because the mean of its divisors is an integer number (24898536).

Almost surely, 2^99539071 is an apocalyptic number.

99539071 is a deficient number, since it is larger than the sum of its proper divisors (55073).

99539071 is a wasteful number, since it uses less digits than its factorization.

99539071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55072.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 99539071 is about 9976.9269316759. The cubic root of 99539071 is about 463.4446372123. Note that the first 3 decimals are identical.

The spelling of 99539071 in words is "ninety-nine million, five hundred thirty-nine thousand, seventy-one".