88171681 has 4 divisors (see below), whose sum is σ = 94954132. Its totient is φ = 81389232.

The previous prime is 88171679. The next prime is 88171691. The reversal of 88171681 is 18617188.

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 10890000 + 77281681 = 3300^2 + 8791^2 .

It is a cyclic number.

It is not a de Polignac number, because 88171681 - 2¹ = 88171679 is a prime.

It is a super-2 number, since 2×88171681² = 15548490660731522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (88171621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391206 + ... + 3391231.

It is an arithmetic number, because the mean of its divisors is an integer number (23738533).

Almost surely, 2^88171681 is an apocalyptic number.

It is an amenable number.

88171681 is a deficient number, since it is larger than the sum of its proper divisors (6782451).

88171681 is a wasteful number, since it uses less digits than its factorization.

88171681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782450.

The product of its digits is 21504, while the sum is 40.

The square root of 88171681 is about 9389.9776890044. The cubic root of 88171681 is about 445.0850840970.

The spelling of 88171681 in words is "eighty-eight million, one hundred seventy-one thousand, six hundred eighty-one".