71323061 has 2 divisors, whose sum is σ = 71323062. Its totient is φ = 71323060.

The previous prime is 71323051. The next prime is 71323123. The reversal of 71323061 is 16032317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43970161 + 27352900 = 6631^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 71323061 - 2¹⁸ = 71060917 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 (71323051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35661530 + 35661531.

It is an arithmetic number, because the mean of its divisors is an integer number (35661531).

Almost surely, 2^71323061 is an apocalyptic number.

It is an amenable number.

71323061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71323061 is an equidigital number, since it uses as much as digits as its factorization.

71323061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 71323061 is about 8445.2981593310. The cubic root of 71323061 is about 414.7088701848.

Adding to 71323061 its reverse (16032317), we get a palindrome (87355378).

The spelling of 71323061 in words is "seventy-one million, three hundred twenty-three thousand, sixty-one".