71275613 has 2 divisors, whose sum is σ = 71275614. Its totient is φ = 71275612.

The previous prime is 71275583. The next prime is 71275627. The reversal of 71275613 is 31657217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69923044 + 1352569 = 8362^2 + 1163^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275613 - 2¹⁴ = 71259229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71275613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71275013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35637806 + 35637807.

It is an arithmetic number, because the mean of its divisors is an integer number (35637807).

Almost surely, 2^71275613 is an apocalyptic number.

It is an amenable number.

71275613 is a deficient number, since it is larger than the sum of its proper divisors (1).

71275613 is an equidigital number, since it uses as much as digits as its factorization.

71275613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 32.

The square root of 71275613 is about 8442.4885549227. The cubic root of 71275613 is about 414.6168874458.

The spelling of 71275613 in words is "seventy-one million, two hundred seventy-five thousand, six hundred thirteen".