99988387 has 4 divisors (see below), whose sum is σ = 100659600. Its totient is φ = 99317176.

The previous prime is 99988367. The next prime is 99988403. The reversal of 99988387 is 78388999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78388999 = 13 ⋅6029923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99988387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99988367) 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 3 ways as a sum of consecutive naturals, for example, 335383 + ... + 335680.

It is an arithmetic number, because the mean of its divisors is an integer number (25164900).

Almost surely, 2^99988387 is an apocalyptic number.

99988387 is a deficient number, since it is larger than the sum of its proper divisors (671213).

99988387 is a wasteful number, since it uses less digits than its factorization.

99988387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671212.

The product of its digits is 7838208, while the sum is 61.

The square root of 99988387 is about 9999.4193331413. The cubic root of 99988387 is about 464.1409150753.

The spelling of 99988387 in words is "ninety-nine million, nine hundred eighty-eight thousand, three hundred eighty-seven".