71275817 has 2 divisors, whose sum is σ = 71275818. Its totient is φ = 71275816.

The previous prime is 71275793. The next prime is 71275843. The reversal of 71275817 is 71857217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48846121 + 22429696 = 6989^2 + 4736^2 .

It is an emirp because it is prime and its reverse (71857217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71275817 - 2¹⁶ = 71210281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71275847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35637908 + 35637909.

It is an arithmetic number, because the mean of its divisors is an integer number (35637909).

Almost surely, 2^71275817 is an apocalyptic number.

It is an amenable number.

71275817 is a deficient number, since it is larger than the sum of its proper divisors (1).

71275817 is an equidigital number, since it uses as much as digits as its factorization.

71275817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 38.

The square root of 71275817 is about 8442.5006366597. The cubic root of 71275817 is about 414.6172830078.

The spelling of 71275817 in words is "seventy-one million, two hundred seventy-five thousand, eight hundred seventeen".