99880087 has 2 divisors, whose sum is σ = 99880088. Its totient is φ = 99880086.

The previous prime is 99880073. The next prime is 99880091. The reversal of 99880087 is 78008899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99880087 - 2¹⁹ = 99355799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99880087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99881087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49940043 + 49940044.

It is an arithmetic number, because the mean of its divisors is an integer number (49940044).

Almost surely, 2^99880087 is an apocalyptic number.

99880087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99880087 is an equidigital number, since it uses as much as digits as its factorization.

99880087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 99880087 is about 9994.0025515306. The cubic root of 99880087 is about 463.9732802068.

The spelling of 99880087 in words is "ninety-nine million, eight hundred eighty thousand, eighty-seven".