87897551 has 8 divisors (see below), whose sum is σ = 102157440. Its totient is φ = 74063448.

The previous prime is 87897539. The next prime is 87897571. The reversal of 87897551 is 15579878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87897551 - 2¹⁸ = 87635407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87897551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87897571) 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 7 ways as a sum of consecutive naturals, for example, 106001 + ... + 106826.

It is an arithmetic number, because the mean of its divisors is an integer number (12769680).

Almost surely, 2^87897551 is an apocalyptic number.

87897551 is a deficient number, since it is larger than the sum of its proper divisors (14259889).

87897551 is a wasteful number, since it uses less digits than its factorization.

87897551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212893.

The product of its digits is 705600, while the sum is 50.

The square root of 87897551 is about 9375.3693793898. The cubic root of 87897551 is about 444.6233415897.

The spelling of 87897551 in words is "eighty-seven million, eight hundred ninety-seven thousand, five hundred fifty-one".