99808997 has 4 divisors (see below), whose sum is σ = 99861216. Its totient is φ = 99756780.

The previous prime is 99808967. The next prime is 99809027. The reversal of 99808997 is 79980899.

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.

It is an interprime number because it is at equal distance from previous prime (99808967) and next prime (99809027).

It is a cyclic number.

It is not a de Polignac number, because 99808997 - 2⁸ = 99808741 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 (99808967) 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, 23129 + ... + 27102.

It is an arithmetic number, because the mean of its divisors is an integer number (24965304).

Almost surely, 2^99808997 is an apocalyptic number.

It is an amenable number.

99808997 is a deficient number, since it is larger than the sum of its proper divisors (52219).

99808997 is a wasteful number, since it uses less digits than its factorization.

99808997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52218.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99808997 is about 9990.4452853714. The cubic root of 99808997 is about 463.8631758806.

The spelling of 99808997 in words is "ninety-nine million, eight hundred eight thousand, nine hundred ninety-seven".