99707089 has 8 divisors (see below), whose sum is σ = 100712360. Its totient is φ = 98706816.

The previous prime is 99707077. The next prime is 99707131. The reversal of 99707089 is 98070799.

It can be written as a sum of positive squares in 4 ways, for example, as 7700625 + 92006464 = 2775^2 + 9592^2 .

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

It is a 4-Lehmer number, since φ(99707089) divides (99707089-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 99707089 - 2⁹ = 99706577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99707029) 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, 48127 + ... + 50155.

It is an arithmetic number, because the mean of its divisors is an integer number (12589045).

Almost surely, 2^99707089 is an apocalyptic number.

It is an amenable number.

99707089 is a deficient number, since it is larger than the sum of its proper divisors (1005271).

99707089 is a wasteful number, since it uses less digits than its factorization.

99707089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 99707089 is about 9985.3437096577. The cubic root of 99707089 is about 463.7052493490.

The spelling of 99707089 in words is "ninety-nine million, seven hundred seven thousand, eighty-nine".