99387887 has 2 divisors, whose sum is σ = 99387888. Its totient is φ = 99387886.

The previous prime is 99387863. The next prime is 99387889. The reversal of 99387887 is 78878399.

It is a strong prime.

It is an emirp because it is prime and its reverse (78878399) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99387887 is a prime.

Together with 99387889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99387889) 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 as a sum of consecutive naturals, namely, 49693943 + 49693944.

It is an arithmetic number, because the mean of its divisors is an integer number (49693944).

Almost surely, 2^99387887 is an apocalyptic number.

99387887 is a deficient number, since it is larger than the sum of its proper divisors (1).

99387887 is an equidigital number, since it uses as much as digits as its factorization.

99387887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 59.

The square root of 99387887 is about 9969.3473708162. The cubic root of 99387887 is about 463.2098854509.

The spelling of 99387887 in words is "ninety-nine million, three hundred eighty-seven thousand, eight hundred eighty-seven".