71470109 has 2 divisors, whose sum is σ = 71470110. Its totient is φ = 71470108.

The previous prime is 71470103. The next prime is 71470117. The reversal of 71470109 is 90107417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71453209 + 16900 = 8453^2 + 130^2 .

It is an emirp because it is prime and its reverse (90107417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71470109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71470103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35735054 + 35735055.

It is an arithmetic number, because the mean of its divisors is an integer number (35735055).

Almost surely, 2^71470109 is an apocalyptic number.

It is an amenable number.

71470109 is a deficient number, since it is larger than the sum of its proper divisors (1).

71470109 is an equidigital number, since it uses as much as digits as its factorization.

71470109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71470109 is about 8453.9995859948. Note that the first 3 decimals coincide. The cubic root of 71470109 is about 414.9936787153.

The spelling of 71470109 in words is "seventy-one million, four hundred seventy thousand, one hundred nine".