87825911 has 4 divisors (see below), whose sum is σ = 87847032. Its totient is φ = 87804792.

The previous prime is 87825889. The next prime is 87825917. The reversal of 87825911 is 11952878.

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

It is a cyclic number.

It is not a de Polignac number, because 87825911 - 2¹⁰ = 87824887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87825917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021 + ... + 13406.

It is an arithmetic number, because the mean of its divisors is an integer number (21961758).

Almost surely, 2^87825911 is an apocalyptic number.

87825911 is a deficient number, since it is larger than the sum of its proper divisors (21121).

87825911 is a wasteful number, since it uses less digits than its factorization.

87825911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120.

The product of its digits is 40320, while the sum is 41.

The square root of 87825911 is about 9371.5479511125. The cubic root of 87825911 is about 444.5025135214.

The spelling of 87825911 in words is "eighty-seven million, eight hundred twenty-five thousand, nine hundred eleven".