87898789 has 32 divisors (see below), whose sum is σ = 105878016. Its totient is φ = 72069120.

The previous prime is 87898777. The next prime is 87898813. The reversal of 87898789 is 98789878.

87898789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 87898789 - 2⁵ = 87898757 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87898789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87898729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641529 + ... + 641665.

It is an arithmetic number, because the mean of its divisors is an integer number (3308688).

Almost surely, 2^87898789 is an apocalyptic number.

It is an amenable number.

87898789 is a deficient number, since it is larger than the sum of its proper divisors (17979227).

87898789 is a wasteful number, since it uses less digits than its factorization.

87898789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 16257024, while the sum is 64.

The square root of 87898789 is about 9375.4354032226. The cubic root of 87898789 is about 444.6254290241.

It can be divided in two parts, 8789 and 8789, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 87898789 in words is "eighty-seven million, eight hundred ninety-eight thousand, seven hundred eighty-nine".