87189267 has 16 divisors (see below), whose sum is σ = 130913280. Its totient is φ = 51136800.

The previous prime is 87189257. The next prime is 87189269. The reversal of 87189267 is 76298178.

It is not a de Polignac number, because 87189267 - 2⁶ = 87189203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87189269) 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 15 ways as a sum of consecutive naturals, for example, 41592 + ... + 43637.

It is an arithmetic number, because the mean of its divisors is an integer number (8182080).

Almost surely, 2^87189267 is an apocalyptic number.

87189267 is a deficient number, since it is larger than the sum of its proper divisors (43724013).

87189267 is a wasteful number, since it uses less digits than its factorization.

87189267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85274.

The product of its digits is 338688, while the sum is 48.

The square root of 87189267 is about 9337.5193172491. The cubic root of 87189267 is about 443.4258516970.

The spelling of 87189267 in words is "eighty-seven million, one hundred eighty-nine thousand, two hundred sixty-seven".