87168551 has 4 divisors (see below), whose sum is σ = 90958512. Its totient is φ = 83378592.

The previous prime is 87168533. The next prime is 87168553. The reversal of 87168551 is 15586178.

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 87168551 - 2¹⁰ = 87167527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87168499 and 87168508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87168553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894946 + ... + 1894991.

It is an arithmetic number, because the mean of its divisors is an integer number (22739628).

Almost surely, 2^87168551 is an apocalyptic number.

87168551 is a deficient number, since it is larger than the sum of its proper divisors (3789961).

87168551 is a wasteful number, since it uses less digits than its factorization.

87168551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789960.

The product of its digits is 67200, while the sum is 41.

The square root of 87168551 is about 9336.4099631496. The cubic root of 87168551 is about 443.3907298757.

The spelling of 87168551 in words is "eighty-seven million, one hundred sixty-eight thousand, five hundred fifty-one".