71943853 has 2 divisors, whose sum is σ = 71943854. Its totient is φ = 71943852.

The previous prime is 71943841. The next prime is 71943923. The reversal of 71943853 is 35834917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68856804 + 3087049 = 8298^2 + 1757^2 .

It is a cyclic number.

It is not a de Polignac number, because 71943853 - 2¹⁷ = 71812781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71923853) 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, 35971926 + 35971927.

It is an arithmetic number, because the mean of its divisors is an integer number (35971927).

Almost surely, 2^71943853 is an apocalyptic number.

It is an amenable number.

71943853 is a deficient number, since it is larger than the sum of its proper divisors (1).

71943853 is an equidigital number, since it uses as much as digits as its factorization.

71943853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 71943853 is about 8481.9722352764. The cubic root of 71943853 is about 415.9085971677.

The spelling of 71943853 in words is "seventy-one million, nine hundred forty-three thousand, eight hundred fifty-three".