87718807 has 4 divisors (see below), whose sum is σ = 95693256. Its totient is φ = 79744360.

The previous prime is 87718789. The next prime is 87718811. The reversal of 87718807 is 70881778.

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 87718807 - 2¹⁹ = 87194519 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 (87718837) 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, 3987208 + ... + 3987229.

It is an arithmetic number, because the mean of its divisors is an integer number (23923314).

Almost surely, 2^87718807 is an apocalyptic number.

87718807 is a deficient number, since it is larger than the sum of its proper divisors (7974449).

87718807 is a wasteful number, since it uses less digits than its factorization.

87718807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7974448.

The product of its (nonzero) digits is 175616, while the sum is 46.

The square root of 87718807 is about 9365.8318904409. The cubic root of 87718807 is about 444.3217492402.

It can be divided in two parts, 8771 and 8807, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 87718807 in words is "eighty-seven million, seven hundred eighteen thousand, eight hundred seven".