71090101 has 4 divisors (see below), whose sum is σ = 72064012. Its totient is φ = 70116192.

The previous prime is 71090093. The next prime is 71090113. The reversal of 71090101 is 10109017.

It is a happy number.

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 15602500 + 55487601 = 3950^2 + 7449^2 .

It is a cyclic number.

It is not a de Polignac number, because 71090101 - 2³ = 71090093 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 (71090501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486846 + ... + 486991.

It is an arithmetic number, because the mean of its divisors is an integer number (18016003).

Almost surely, 2^71090101 is an apocalyptic number.

It is an amenable number.

71090101 is a deficient number, since it is larger than the sum of its proper divisors (973911).

71090101 is an equidigital number, since it uses as much as digits as its factorization.

71090101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973910.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 71090101 is about 8431.4945887429. The cubic root of 71090101 is about 414.2568613788.

Adding to 71090101 its reverse (10109017), we get a palindrome (81199118).

The spelling of 71090101 in words is "seventy-one million, ninety thousand, one hundred one".