87889787 has 2 divisors, whose sum is σ = 87889788. Its totient is φ = 87889786.

The previous prime is 87889771. The next prime is 87889793. The reversal of 87889787 is 78798878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87889787 - 2⁴ = 87889771 is a prime.

It is a super-2 number, since 2×87889787² = 15449229317810738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87889727) 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, 43944893 + 43944894.

It is an arithmetic number, because the mean of its divisors is an integer number (43944894).

Almost surely, 2^87889787 is an apocalyptic number.

87889787 is a deficient number, since it is larger than the sum of its proper divisors (1).

87889787 is an equidigital number, since it uses as much as digits as its factorization.

87889787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 62.

The square root of 87889787 is about 9374.9553065601. The cubic root of 87889787 is about 444.6102499953.

Subtracting from 87889787 its reverse (78798878), we obtain a palindrome (9090909).

The spelling of 87889787 in words is "eighty-seven million, eight hundred eighty-nine thousand, seven hundred eighty-seven".