71065133 has 2 divisors, whose sum is σ = 71065134. Its totient is φ = 71065132.

The previous prime is 71065069. The next prime is 71065139. The reversal of 71065133 is 33156017.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59320804 + 11744329 = 7702^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 71065133 - 2⁶ = 71065069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71065139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35532566 + 35532567.

It is an arithmetic number, because the mean of its divisors is an integer number (35532567).

Almost surely, 2^71065133 is an apocalyptic number.

It is an amenable number.

71065133 is a deficient number, since it is larger than the sum of its proper divisors (1).

71065133 is an equidigital number, since it uses as much as digits as its factorization.

71065133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 71065133 is about 8430.0138196803. The cubic root of 71065133 is about 414.2083577836.

The spelling of 71065133 in words is "seventy-one million, sixty-five thousand, one hundred thirty-three".