87172306 has 16 divisors (see below), whose sum is σ = 141120000. Its totient is φ = 40146768.

The previous prime is 87172249. The next prime is 87172331. The reversal of 87172306 is 60327178.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9615 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (8820000).

Almost surely, 2^87172306 is an apocalyptic number.

87172306 is a deficient number, since it is larger than the sum of its proper divisors (53947694).

87172306 is a wasteful number, since it uses less digits than its factorization.

87172306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 87172306 is about 9336.6110554098. The cubic root of 87172306 is about 443.3970965002.

It can be divided in two parts, 87172 and 306, that added together give a palindrome (87478).

The spelling of 87172306 in words is "eighty-seven million, one hundred seventy-two thousand, three hundred six".