87255189 has 12 divisors (see below), whose sum is σ = 144040416. Its totient is φ = 49860072.

The previous prime is 87255187. The next prime is 87255191. The reversal of 87255189 is 98155278.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87255187) and next prime (87255191).

It is not a de Polignac number, because 87255189 - 2¹ = 87255187 is a prime.

It is a super-2 number, since 2×87255189² = 15226936014851442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87255187) 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 11 ways as a sum of consecutive naturals, for example, 692439 + ... + 692564.

It is an arithmetic number, because the mean of its divisors is an integer number (12003368).

Almost surely, 2^87255189 is an apocalyptic number.

It is an amenable number.

87255189 is a deficient number, since it is larger than the sum of its proper divisors (56785227).

87255189 is a wasteful number, since it uses less digits than its factorization.

87255189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385016 (or 1385013 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 87255189 is about 9341.0486028069. The cubic root of 87255189 is about 443.5375785795.

The spelling of 87255189 in words is "eighty-seven million, two hundred fifty-five thousand, one hundred eighty-nine".