99508289 has 4 divisors (see below), whose sum is σ = 99578880. Its totient is φ = 99437700.

The previous prime is 99508273. The next prime is 99508303. The reversal of 99508289 is 98280599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98280599 = 5711 ⋅17209.

It is a cyclic number.

It is not a de Polignac number, because 99508289 - 2⁴ = 99508273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99508789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33137 + ... + 36014.

It is an arithmetic number, because the mean of its divisors is an integer number (24894720).

Almost surely, 2^99508289 is an apocalyptic number.

It is an amenable number.

99508289 is a deficient number, since it is larger than the sum of its proper divisors (70591).

99508289 is a wasteful number, since it uses less digits than its factorization.

99508289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70590.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 99508289 is about 9975.3841530038. The cubic root of 99508289 is about 463.3968595792.

The spelling of 99508289 in words is "ninety-nine million, five hundred eight thousand, two hundred eighty-nine".