71370109 has 2 divisors, whose sum is σ = 71370110. Its totient is φ = 71370108.

The previous prime is 71370107. The next prime is 71370113. The reversal of 71370109 is 90107317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 35105625 = 6022^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 71370109 - 2¹ = 71370107 is a prime.

Together with 71370107, it forms a pair of twin primes.

It is equal to p_4193830 and since 71370109 and 4193830 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 (71370107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35685054 + 35685055.

It is an arithmetic number, because the mean of its divisors is an integer number (35685055).

Almost surely, 2^71370109 is an apocalyptic number.

It is an amenable number.

71370109 is a deficient number, since it is larger than the sum of its proper divisors (1).

71370109 is an equidigital number, since it uses as much as digits as its factorization.

71370109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 71370109 is about 8448.0831553673. The cubic root of 71370109 is about 414.8000372120.

The spelling of 71370109 in words is "seventy-one million, three hundred seventy thousand, one hundred nine".