88005691 has 4 divisors (see below), whose sum is σ = 91040400. Its totient is φ = 84970984.

The previous prime is 88005653. The next prime is 88005713. The reversal of 88005691 is 19650088.

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 88005691 - 2¹⁵ = 87972923 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 88005691.

It is not an unprimeable number, because it can be changed into a prime (88005611) 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, 1517311 + ... + 1517368.

It is an arithmetic number, because the mean of its divisors is an integer number (22760100).

Almost surely, 2^88005691 is an apocalyptic number.

88005691 is a deficient number, since it is larger than the sum of its proper divisors (3034709).

88005691 is a wasteful number, since it uses less digits than its factorization.

88005691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034708.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 88005691 is about 9381.1348460621. The cubic root of 88005691 is about 444.8056062941.

The spelling of 88005691 in words is "eighty-eight million, five thousand, six hundred ninety-one".