71013869 has 2 divisors, whose sum is σ = 71013870. Its totient is φ = 71013868.

The previous prime is 71013829. The next prime is 71013871. The reversal of 71013869 is 96831017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46758244 + 24255625 = 6838^2 + 4925^2 .

It is an emirp because it is prime and its reverse (96831017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71013869 - 2¹² = 71009773 is a prime.

It is a super-2 number, since 2×71013869² = 10085939180698322, which contains 22 as substring.

Together with 71013871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71013829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35506934 + 35506935.

It is an arithmetic number, because the mean of its divisors is an integer number (35506935).

Almost surely, 2^71013869 is an apocalyptic number.

It is an amenable number.

71013869 is a deficient number, since it is larger than the sum of its proper divisors (1).

71013869 is an equidigital number, since it uses as much as digits as its factorization.

71013869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 71013869 is about 8426.9727067316. The cubic root of 71013869 is about 414.1087351594.

The spelling of 71013869 in words is "seventy-one million, thirteen thousand, eight hundred sixty-nine".