99808961 has 8 divisors (see below), whose sum is σ = 115349760. Its totient is φ = 84588768.

The previous prime is 99808939. The next prime is 99808967. The reversal of 99808961 is 16980899.

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 99808961 - 2²⁶ = 32700097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99808967) 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, 79481 + ... + 80726.

It is an arithmetic number, because the mean of its divisors is an integer number (14418720).

Almost surely, 2^99808961 is an apocalyptic number.

It is an amenable number.

99808961 is a deficient number, since it is larger than the sum of its proper divisors (15540799).

99808961 is a wasteful number, since it uses less digits than its factorization.

99808961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160303.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 99808961 is about 9990.4434836498. The cubic root of 99808961 is about 463.8631201105.

The spelling of 99808961 in words is "ninety-nine million, eight hundred eight thousand, nine hundred sixty-one".