71000513 has 2 divisors, whose sum is σ = 71000514. Its totient is φ = 71000512.

The previous prime is 71000467. The next prime is 71000519. The reversal of 71000513 is 31500017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51437584 + 19562929 = 7172^2 + 4423^2 .

It is an emirp because it is prime and its reverse (31500017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71000513 - 2⁸ = 71000257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71000491 and 71000500.

It is not a weakly prime, because it can be changed into another prime (71000519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35500256 + 35500257.

It is an arithmetic number, because the mean of its divisors is an integer number (35500257).

Almost surely, 2^71000513 is an apocalyptic number.

It is an amenable number.

71000513 is a deficient number, since it is larger than the sum of its proper divisors (1).

71000513 is an equidigital number, since it uses as much as digits as its factorization.

71000513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105, while the sum is 17.

The square root of 71000513 is about 8426.1802140709. The cubic root of 71000513 is about 414.0827722354.

The spelling of 71000513 in words is "seventy-one million, five hundred thirteen", and thus it is an aban number.