87912789 has 8 divisors (see below), whose sum is σ = 117349920. Its totient is φ = 58542096.

The previous prime is 87912779. The next prime is 87912793. The reversal of 87912789 is 98721978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87912789 - 2⁹ = 87912277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87912709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13434 + ... + 18875.

It is an arithmetic number, because the mean of its divisors is an integer number (14668740).

Almost surely, 2^87912789 is an apocalyptic number.

It is an amenable number.

87912789 is a deficient number, since it is larger than the sum of its proper divisors (29437131).

87912789 is a wasteful number, since it uses less digits than its factorization.

87912789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33219.

The product of its digits is 508032, while the sum is 51.

The square root of 87912789 is about 9376.1820054860. The cubic root of 87912789 is about 444.6490335418.

The spelling of 87912789 in words is "eighty-seven million, nine hundred twelve thousand, seven hundred eighty-nine".