99707971 has 8 divisors (see below), whose sum is σ = 109029888. Its totient is φ = 90429000.

The previous prime is 99707963. The next prime is 99708001. The reversal of 99707971 is 17970799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99707971 - 2³ = 99707963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99707911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5775 + ... + 15256.

It is an arithmetic number, because the mean of its divisors is an integer number (13628736).

Almost surely, 2^99707971 is an apocalyptic number.

99707971 is a deficient number, since it is larger than the sum of its proper divisors (9321917).

99707971 is a wasteful number, since it uses less digits than its factorization.

99707971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21473.

The product of its (nonzero) digits is 250047, while the sum is 49.

The square root of 99707971 is about 9985.3878742891. The cubic root of 99707971 is about 463.7066166433.

The spelling of 99707971 in words is "ninety-nine million, seven hundred seven thousand, nine hundred seventy-one".