87209925 has 48 divisors (see below), whose sum is σ = 161602752. Its totient is φ = 41126400.

The previous prime is 87209923. The next prime is 87209929. The reversal of 87209925 is 52990278.

It is not a de Polignac number, because 87209925 - 2¹ = 87209923 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87209921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29097 + ... + 31953.

It is an arithmetic number, because the mean of its divisors is an integer number (3366724).

Almost surely, 2^87209925 is an apocalyptic number.

It is an amenable number.

87209925 is a deficient number, since it is larger than the sum of its proper divisors (74392827).

87209925 is a wasteful number, since it uses less digits than its factorization.

87209925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 87209925 is about 9338.6254341846. The cubic root of 87209925 is about 443.4608696459.

It can be divided in two parts, 87 and 209925, that added together give a palindrome (210012).

The spelling of 87209925 in words is "eighty-seven million, two hundred nine thousand, nine hundred twenty-five".