71080817 has 2 divisors, whose sum is σ = 71080818. Its totient is φ = 71080816.

The previous prime is 71080813. The next prime is 71080853. The reversal of 71080817 is 71808017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63218401 + 7862416 = 7951^2 + 2804^2 .

It is a cyclic number.

It is not a de Polignac number, because 71080817 - 2² = 71080813 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71080813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35540408 + 35540409.

It is an arithmetic number, because the mean of its divisors is an integer number (35540409).

Almost surely, 2^71080817 is an apocalyptic number.

It is an amenable number.

71080817 is a deficient number, since it is larger than the sum of its proper divisors (1).

71080817 is an equidigital number, since it uses as much as digits as its factorization.

71080817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 71080817 is about 8430.9440159451. The cubic root of 71080817 is about 414.2388273250.

The spelling of 71080817 in words is "seventy-one million, eighty thousand, eight hundred seventeen".