99980087 has 2 divisors, whose sum is σ = 99980088. Its totient is φ = 99980086.

The previous prime is 99980063. The next prime is 99980123. The reversal of 99980087 is 78008999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99980087 - 2¹² = 99975991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99980047) 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, 49990043 + 49990044.

It is an arithmetic number, because the mean of its divisors is an integer number (49990044).

Almost surely, 2^99980087 is an apocalyptic number.

99980087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980087 is an equidigital number, since it uses as much as digits as its factorization.

99980087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 99980087 is about 9999.0043004291. The cubic root of 99980087 is about 464.1280719966.

The spelling of 99980087 in words is "ninety-nine million, nine hundred eighty thousand, eighty-seven".