71761061 has 2 divisors, whose sum is σ = 71761062. Its totient is φ = 71761060.

The previous prime is 71761033. The next prime is 71761091. The reversal of 71761061 is 16016717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60996100 + 10764961 = 7810^2 + 3281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71761061 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 (71761091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35880530 + 35880531.

It is an arithmetic number, because the mean of its divisors is an integer number (35880531).

Almost surely, 2^71761061 is an apocalyptic number.

It is an amenable number.

71761061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71761061 is an equidigital number, since it uses as much as digits as its factorization.

71761061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71761061 is about 8471.1900580733. The cubic root of 71761061 is about 415.5560572400.

Adding to 71761061 its reverse (16016717), we get a palindrome (87777778).

The spelling of 71761061 in words is "seventy-one million, seven hundred sixty-one thousand, sixty-one".