88108921 has 4 divisors (see below), whose sum is σ = 88203892. Its totient is φ = 88013952.

The previous prime is 88108901. The next prime is 88108957. The reversal of 88108921 is 12980188.

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 23386896 + 64722025 = 4836^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 88108921 - 2⁷ = 88108793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88108901) 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, 46080 + ... + 47953.

It is an arithmetic number, because the mean of its divisors is an integer number (22050973).

Almost surely, 2^88108921 is an apocalyptic number.

It is an amenable number.

88108921 is a deficient number, since it is larger than the sum of its proper divisors (94971).

88108921 is an equidigital number, since it uses as much as digits as its factorization.

88108921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94970.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 88108921 is about 9386.6352331387. The cubic root of 88108921 is about 444.9794561908.

The spelling of 88108921 in words is "eighty-eight million, one hundred eight thousand, nine hundred twenty-one".