87168399 has 4 divisors (see below), whose sum is σ = 116224536. Its totient is φ = 58112264.

The previous prime is 87168359. The next prime is 87168437. The reversal of 87168399 is 99386178.

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 87168399 - 2⁷ = 87168271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87168359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14528064 + ... + 14528069.

It is an arithmetic number, because the mean of its divisors is an integer number (29056134).

Almost surely, 2^87168399 is an apocalyptic number.

87168399 is a deficient number, since it is larger than the sum of its proper divisors (29056137).

87168399 is a wasteful number, since it uses less digits than its factorization.

87168399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29056136.

The product of its digits is 653184, while the sum is 51.

The square root of 87168399 is about 9336.4018229723. The cubic root of 87168399 is about 443.3904721550.

The spelling of 87168399 in words is "eighty-seven million, one hundred sixty-eight thousand, three hundred ninety-nine".