87218797 has 8 divisors (see below), whose sum is σ = 92080800. Its totient is φ = 82383984.

The previous prime is 87218777. The next prime is 87218821. The reversal of 87218797 is 79781278.

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 87218797 - 2²³ = 78830189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87218797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87218707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (11510100).

Almost surely, 2^87218797 is an apocalyptic number.

It is an amenable number.

87218797 is a deficient number, since it is larger than the sum of its proper divisors (4862003).

87218797 is a wasteful number, since it uses less digits than its factorization.

87218797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13595.

The product of its digits is 395136, while the sum is 49.

The square root of 87218797 is about 9339.1004384791. The cubic root of 87218797 is about 443.4759071217.

The spelling of 87218797 in words is "eighty-seven million, two hundred eighteen thousand, seven hundred ninety-seven".