87128183 has 2 divisors, whose sum is σ = 87128184. Its totient is φ = 87128182.

The previous prime is 87128161. The next prime is 87128219. The reversal of 87128183 is 38182178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87128183 - 2⁸ = 87127927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87128143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43564091 + 43564092.

It is an arithmetic number, because the mean of its divisors is an integer number (43564092).

Almost surely, 2^87128183 is an apocalyptic number.

87128183 is a deficient number, since it is larger than the sum of its proper divisors (1).

87128183 is an equidigital number, since it uses as much as digits as its factorization.

87128183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 38.

The square root of 87128183 is about 9334.2478540052. The cubic root of 87128183 is about 443.3222741445.

The spelling of 87128183 in words is "eighty-seven million, one hundred twenty-eight thousand, one hundred eighty-three".