88765581 has 4 divisors (see below), whose sum is σ = 118354112. Its totient is φ = 59177052.

The previous prime is 88765571. The next prime is 88765597. The reversal of 88765581 is 18556788.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 88765581 - 2¹⁷ = 88634509 is a prime.

It is a super-2 number, since 2×88765581² = 15758656740535122, which contains 22 as substring.

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 88765581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88765541) 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, 14794261 + ... + 14794266.

It is an arithmetic number, because the mean of its divisors is an integer number (29588528).

Almost surely, 2^88765581 is an apocalyptic number.

It is an amenable number.

88765581 is a deficient number, since it is larger than the sum of its proper divisors (29588531).

88765581 is a wasteful number, since it uses less digits than its factorization.

88765581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29588530.

The product of its digits is 537600, while the sum is 48.

The square root of 88765581 is about 9421.5487580334. The cubic root of 88765581 is about 446.0821719804.

The spelling of 88765581 in words is "eighty-eight million, seven hundred sixty-five thousand, five hundred eighty-one".