88681021 has 12 divisors (see below), whose sum is σ = 104975836. Its totient is φ = 74416320.

The previous prime is 88681009. The next prime is 88681039. The reversal of 88681021 is 12018688.

It can be written as a sum of positive squares in 2 ways, for example, as 6125625 + 82555396 = 2475^2 + 9086^2 .

It is not a de Polignac number, because 88681021 - 2¹⁵ = 88648253 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88681091) 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 11 ways as a sum of consecutive naturals, for example, 26616 + ... + 29761.

Almost surely, 2^88681021 is an apocalyptic number.

It is an amenable number.

88681021 is a deficient number, since it is larger than the sum of its proper divisors (16294815).

88681021 is a wasteful number, since it uses less digits than its factorization.

88681021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56412 (or 56401 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 88681021 is about 9417.0601038753. The cubic root of 88681021 is about 445.9404778228.

It can be divided in two parts, 8868 and 1021, that added together give a palindrome (9889).

The spelling of 88681021 in words is "eighty-eight million, six hundred eighty-one thousand, twenty-one".