71709061 has 2 divisors, whose sum is σ = 71709062. Its totient is φ = 71709060.

The previous prime is 71709037. The next prime is 71709067. The reversal of 71709061 is 16090717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66096900 + 5612161 = 8130^2 + 2369^2 .

It is an emirp because it is prime and its reverse (16090717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71709061 - 2⁷ = 71708933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71709067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35854530 + 35854531.

It is an arithmetic number, because the mean of its divisors is an integer number (35854531).

Almost surely, 2^71709061 is an apocalyptic number.

It is an amenable number.

71709061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71709061 is an equidigital number, since it uses as much as digits as its factorization.

71709061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 71709061 is about 8468.1202754803. The cubic root of 71709061 is about 415.4556586105.

Adding to 71709061 its reverse (16090717), we get a palindrome (87799778).

The spelling of 71709061 in words is "seventy-one million, seven hundred nine thousand, sixty-one".