87673989 has 48 divisors (see below), whose sum is σ = 134395200. Its totient is φ = 50738688.

The previous prime is 87673973. The next prime is 87673997. The reversal of 87673989 is 98937678.

It is not a de Polignac number, because 87673989 - 2⁴ = 87673973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87673889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 985057 + ... + 985145.

It is an arithmetic number, because the mean of its divisors is an integer number (2799900).

Almost surely, 2^87673989 is an apocalyptic number.

87673989 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

87673989 is a deficient number, since it is larger than the sum of its proper divisors (46721211).

87673989 is a wasteful number, since it uses less digits than its factorization.

87673989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 201 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The square root of 87673989 is about 9363.4389515818. The cubic root of 87673989 is about 444.2460641988.

The spelling of 87673989 in words is "eighty-seven million, six hundred seventy-three thousand, nine hundred eighty-nine".