99988697 has 6 divisors (see below), whose sum is σ = 105528618. Its totient is φ = 94725792.

The previous prime is 99988649. The next prime is 99988753. The reversal of 99988697 is 79688999.

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 866761 = 9956^2 + 931^2 .

It is not a de Polignac number, because 99988697 - 2⁶ = 99988633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99988597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138128 + ... + 138849.

It is an arithmetic number, because the mean of its divisors is an integer number (17588103).

Almost surely, 2^99988697 is an apocalyptic number.

It is an amenable number.

99988697 is a deficient number, since it is larger than the sum of its proper divisors (5539921).

99988697 is a wasteful number, since it uses less digits than its factorization.

99988697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277015 (or 276996 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 65.

The square root of 99988697 is about 9999.4348340294. The cubic root of 99988697 is about 464.1413947428.

The spelling of 99988697 in words is "ninety-nine million, nine hundred eighty-eight thousand, six hundred ninety-seven".