88009681 has 4 divisors (see below), whose sum is σ = 88600500. Its totient is φ = 87418864.

The previous prime is 88009679. The next prime is 88009687. The reversal of 88009681 is 18690088.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11289600 + 76720081 = 3360^2 + 8759^2 .

It is a cyclic number.

It is not a de Polignac number, because 88009681 - 2¹ = 88009679 is a prime.

It is a super-2 number, since 2×88009681² = 15491407899443522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88009687) 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, 295186 + ... + 295483.

It is an arithmetic number, because the mean of its divisors is an integer number (22150125).

Almost surely, 2^88009681 is an apocalyptic number.

It is an amenable number.

88009681 is a deficient number, since it is larger than the sum of its proper divisors (590819).

88009681 is a wasteful number, since it uses less digits than its factorization.

88009681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590818.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 88009681 is about 9381.3475044900. The cubic root of 88009681 is about 444.8123283879.

It can be divided in two parts, 8800 and 9681, that added together give a palindrome (18481).

The spelling of 88009681 in words is "eighty-eight million, nine thousand, six hundred eighty-one".