99870787 has 2 divisors, whose sum is σ = 99870788. Its totient is φ = 99870786.

The previous prime is 99870781. The next prime is 99870833. The reversal of 99870787 is 78707899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99870787 - 2³ = 99870779 is a prime.

It is not a weakly prime, because it can be changed into another prime (99870781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49935393 + 49935394.

It is an arithmetic number, because the mean of its divisors is an integer number (49935394).

Almost surely, 2^99870787 is an apocalyptic number.

99870787 is a deficient number, since it is larger than the sum of its proper divisors (1).

99870787 is an equidigital number, since it uses as much as digits as its factorization.

99870787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 99870787 is about 9993.5372616507. The cubic root of 99870787 is about 463.9588793201.

The spelling of 99870787 in words is "ninety-nine million, eight hundred seventy thousand, seven hundred eighty-seven".