99710591 has 4 divisors (see below), whose sum is σ = 99858552. Its totient is φ = 99562632.

The previous prime is 99710587. The next prime is 99710657. The reversal of 99710591 is 19501799.

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 99710591 - 2² = 99710587 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 (99710521) 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, 72965 + ... + 74318.

It is an arithmetic number, because the mean of its divisors is an integer number (24964638).

Almost surely, 2^99710591 is an apocalyptic number.

99710591 is a deficient number, since it is larger than the sum of its proper divisors (147961).

99710591 is a wasteful number, since it uses less digits than its factorization.

99710591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147960.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 99710591 is about 9985.5190651263. The cubic root of 99710591 is about 463.7106781732.

The spelling of 99710591 in words is "ninety-nine million, seven hundred ten thousand, five hundred ninety-one".