8142168901 has 2 divisors, whose sum is σ = 8142168902. Its totient is φ = 8142168900.

The previous prime is 8142168899. The next prime is 8142168907. The reversal of 8142168901 is 1098612418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4301392225 + 3840776676 = 65585^2 + 61974^2 .

It is a cyclic number.

It is not a de Polignac number, because 8142168901 - 2¹ = 8142168899 is a prime.

Together with 8142168899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8142168907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4071084450 + 4071084451.

It is an arithmetic number, because the mean of its divisors is an integer number (4071084451).

Almost surely, 2^8142168901 is an apocalyptic number.

It is an amenable number.

8142168901 is a deficient number, since it is larger than the sum of its proper divisors (1).

8142168901 is an equidigital number, since it uses as much as digits as its factorization.

8142168901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 8142168901 is about 90233.9675565693. The cubic root of 8142168901 is about 2011.7779126515. Note that the first 3 decimals are identical.

The spelling of 8142168901 in words is "eight billion, one hundred forty-two million, one hundred sixty-eight thousand, nine hundred one".