87382989 has 8 divisors (see below), whose sum is σ = 129456320. Its totient is φ = 58255308.

The previous prime is 87382979. The next prime is 87382991. The reversal of 87382989 is 98928378.

It is not a de Polignac number, because 87382989 - 2⁸ = 87382733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87382949) 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, 1618177 + ... + 1618230.

It is an arithmetic number, because the mean of its divisors is an integer number (16182040).

Almost surely, 2^87382989 is an apocalyptic number.

It is an amenable number.

87382989 is a deficient number, since it is larger than the sum of its proper divisors (42073331).

87382989 is a wasteful number, since it uses less digits than its factorization.

87382989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236416 (or 3236410 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 87382989 is about 9347.8868735132. The cubic root of 87382989 is about 443.7540182404.

The spelling of 87382989 in words is "eighty-seven million, three hundred eighty-two thousand, nine hundred eighty-nine".