106888921 has 2 divisors, whose sum is σ = 106888922. Its totient is φ = 106888920.

The previous prime is 106888891. The next prime is 106888931. The reversal of 106888921 is 129888601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104264521 + 2624400 = 10211^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 106888921 - 2¹¹ = 106886873 is a prime.

It is a super-2 number, since 2×106888921² = 22850482865088482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106888931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53444460 + 53444461.

It is an arithmetic number, because the mean of its divisors is an integer number (53444461).

Almost surely, 2^106888921 is an apocalyptic number.

It is an amenable number.

106888921 is a deficient number, since it is larger than the sum of its proper divisors (1).

106888921 is an equidigital number, since it uses as much as digits as its factorization.

106888921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 106888921 is about 10338.7098324694. The cubic root of 106888921 is about 474.5816016499.

The spelling of 106888921 in words is "one hundred six million, eight hundred eighty-eight thousand, nine hundred twenty-one".