71192813 has 2 divisors, whose sum is σ = 71192814. Its totient is φ = 71192812.

The previous prime is 71192801. The next prime is 71192837. The reversal of 71192813 is 31829117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 13235044 = 7613^2 + 3638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71192813 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 71192813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71192893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35596406 + 35596407.

It is an arithmetic number, because the mean of its divisors is an integer number (35596407).

Almost surely, 2^71192813 is an apocalyptic number.

It is an amenable number.

71192813 is a deficient number, since it is larger than the sum of its proper divisors (1).

71192813 is an equidigital number, since it uses as much as digits as its factorization.

71192813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 71192813 is about 8437.5833625512. The cubic root of 71192813 is about 414.4562734616.

The spelling of 71192813 in words is "seventy-one million, one hundred ninety-two thousand, eight hundred thirteen".