71982293 has 2 divisors, whose sum is σ = 71982294. Its totient is φ = 71982292.

The previous prime is 71982283. The next prime is 71982299. The reversal of 71982293 is 39228917.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 10876804 = 7817^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 71982293 - 2⁴ = 71982277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71982293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71982299) 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, 35991146 + 35991147.

It is an arithmetic number, because the mean of its divisors is an integer number (35991147).

Almost surely, 2^71982293 is an apocalyptic number.

It is an amenable number.

71982293 is a deficient number, since it is larger than the sum of its proper divisors (1).

71982293 is an equidigital number, since it uses as much as digits as its factorization.

71982293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 71982293 is about 8484.2379150988. The cubic root of 71982293 is about 415.9826580696.

The spelling of 71982293 in words is "seventy-one million, nine hundred eighty-two thousand, two hundred ninety-three".