71773973 has 2 divisors, whose sum is σ = 71773974. Its totient is φ = 71773972.

The previous prime is 71773967. The next prime is 71773987. The reversal of 71773973 is 37937717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67207204 + 4566769 = 8198^2 + 2137^2 .

It is a cyclic number.

It is not a de Polignac number, because 71773973 - 2¹⁴ = 71757589 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 (71773073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35886986 + 35886987.

It is an arithmetic number, because the mean of its divisors is an integer number (35886987).

Almost surely, 2^71773973 is an apocalyptic number.

It is an amenable number.

71773973 is a deficient number, since it is larger than the sum of its proper divisors (1).

71773973 is an equidigital number, since it uses as much as digits as its factorization.

71773973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194481, while the sum is 44.

The square root of 71773973 is about 8471.9521363143. The cubic root of 71773973 is about 415.5809794748.

The spelling of 71773973 in words is "seventy-one million, seven hundred seventy-three thousand, nine hundred seventy-three".