87643275 has 24 divisors (see below), whose sum is σ = 147286704. Its totient is φ = 45974400.

The previous prime is 87643273. The next prime is 87643301. The reversal of 87643275 is 57234678.

It is not a de Polignac number, because 87643275 - 2¹ = 87643273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87643273) 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 23 ways as a sum of consecutive naturals, for example, 5004 + ... + 14153.

It is an arithmetic number, because the mean of its divisors is an integer number (6136946).

Almost surely, 2^87643275 is an apocalyptic number.

87643275 is a deficient number, since it is larger than the sum of its proper divisors (59643429).

87643275 is a wasteful number, since it uses less digits than its factorization.

87643275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19231 (or 19226 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 87643275 is about 9361.7987053771. The cubic root of 87643275 is about 444.1941819648.

The spelling of 87643275 in words is "eighty-seven million, six hundred forty-three thousand, two hundred seventy-five".