71098613 has 2 divisors, whose sum is σ = 71098614. Its totient is φ = 71098612.

The previous prime is 71098609. The next prime is 71098661. The reversal of 71098613 is 31689017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62378404 + 8720209 = 7898^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 71098613 - 2² = 71098609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4178834 and since 71098613 and 4178834 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71098603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35549306 + 35549307.

It is an arithmetic number, because the mean of its divisors is an integer number (35549307).

Almost surely, 2^71098613 is an apocalyptic number.

It is an amenable number.

71098613 is a deficient number, since it is larger than the sum of its proper divisors (1).

71098613 is an equidigital number, since it uses as much as digits as its factorization.

71098613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 71098613 is about 8431.9993477229. Note that the first 3 decimals coincide. The cubic root of 71098613 is about 414.2733944527.

The spelling of 71098613 in words is "seventy-one million, ninety-eight thousand, six hundred thirteen".