71365961 has 2 divisors, whose sum is σ = 71365962. Its totient is φ = 71365960.

The previous prime is 71365951. The next prime is 71365979. The reversal of 71365961 is 16956317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 31990336 = 6275^2 + 5656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71365961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71365901) 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, 35682980 + 35682981.

It is an arithmetic number, because the mean of its divisors is an integer number (35682981).

Almost surely, 2^71365961 is an apocalyptic number.

It is an amenable number.

71365961 is a deficient number, since it is larger than the sum of its proper divisors (1).

71365961 is an equidigital number, since it uses as much as digits as its factorization.

71365961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 71365961 is about 8447.8376523226. The cubic root of 71365961 is about 414.7920010565.

The spelling of 71365961 in words is "seventy-one million, three hundred sixty-five thousand, nine hundred sixty-one".