168090101 has 4 divisors (see below), whose sum is σ = 177977772. Its totient is φ = 158202432.

The previous prime is 168090089. The next prime is 168090103. The reversal of 168090101 is 101090861.

168090101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101090861 = 311 ⋅325051.

It can be written as a sum of positive squares in 2 ways, for example, as 91107025 + 76983076 = 9545^2 + 8774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168090101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168090103) 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, 4943810 + ... + 4943843.

It is an arithmetic number, because the mean of its divisors is an integer number (44494443).

Almost surely, 2^168090101 is an apocalyptic number.

It is an amenable number.

168090101 is a deficient number, since it is larger than the sum of its proper divisors (9887671).

168090101 is an equidigital number, since it uses as much as digits as its factorization.

168090101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9887670.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 168090101 is about 12964.9566524536. The cubic root of 168090101 is about 551.8834612290.

The spelling of 168090101 in words is "one hundred sixty-eight million, ninety thousand, one hundred one".