87658769 has 8 divisors (see below), whose sum is σ = 97196160. Its totient is φ = 78382800.

The previous prime is 87658757. The next prime is 87658777. The reversal of 87658769 is 96785678.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87658769 is a prime.

It is a super-2 number, since 2×87658769² = 15368119565190722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87658709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64649 + ... + 65990.

It is an arithmetic number, because the mean of its divisors is an integer number (12149520).

Almost surely, 2^87658769 is an apocalyptic number.

It is an amenable number.

87658769 is a deficient number, since it is larger than the sum of its proper divisors (9537391).

87658769 is a wasteful number, since it uses less digits than its factorization.

87658769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130711.

The product of its digits is 5080320, while the sum is 56.

The square root of 87658769 is about 9362.6261807251. The cubic root of 87658769 is about 444.2203560176.

It can be divided in two parts, 87 and 658769, that added together give a palindrome (658856).

The spelling of 87658769 in words is "eighty-seven million, six hundred fifty-eight thousand, seven hundred sixty-nine".