87125018 has 4 divisors (see below), whose sum is σ = 130687530. Its totient is φ = 43562508.

The previous prime is 87125011. The next prime is 87125033. The reversal of 87125018 is 81052178.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83411689 + 3713329 = 9133^2 + 1927^2 .

It is not an unprimeable number, because it can be changed into a prime (87125011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21781253 + ... + 21781256.

Almost surely, 2^87125018 is an apocalyptic number.

87125018 is a deficient number, since it is larger than the sum of its proper divisors (43562512).

87125018 is a wasteful number, since it uses less digits than its factorization.

87125018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43562511.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 87125018 is about 9334.0783155060. The cubic root of 87125018 is about 443.3169060690.

The spelling of 87125018 in words is "eighty-seven million, one hundred twenty-five thousand, eighteen".