71840101 has 2 divisors, whose sum is σ = 71840102. Its totient is φ = 71840100.

The previous prime is 71840099. The next prime is 71840107. The reversal of 71840101 is 10104817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 14822500 = 7551^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 71840101 - 2¹ = 71840099 is a prime.

It is a super-2 number, since 2×71840101² = 10322000223380402, which contains 22 as substring.

Together with 71840099, 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 (71840107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35920050 + 35920051.

It is an arithmetic number, because the mean of its divisors is an integer number (35920051).

Almost surely, 2^71840101 is an apocalyptic number.

It is an amenable number.

71840101 is a deficient number, since it is larger than the sum of its proper divisors (1).

71840101 is an equidigital number, since it uses as much as digits as its factorization.

71840101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 71840101 is about 8475.8539982706. The cubic root of 71840101 is about 415.7085703097.

Adding to 71840101 its reverse (10104817), we get a palindrome (81944918).

The spelling of 71840101 in words is "seventy-one million, eight hundred forty thousand, one hundred one".