71940229 has 2 divisors, whose sum is σ = 71940230. Its totient is φ = 71940228.

The previous prime is 71940227. The next prime is 71940241. The reversal of 71940229 is 92204917.

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., 54908100 + 17032129 = 7410^2 + 4127^2 .

It is a cyclic number.

It is not a de Polignac number, because 71940229 - 2¹ = 71940227 is a prime.

It is a super-3 number, since 3×71940229³ (a number of 25 digits) contains 333 as substring.

Together with 71940227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71940194 and 71940203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71940227) 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, 35970114 + 35970115.

It is an arithmetic number, because the mean of its divisors is an integer number (35970115).

Almost surely, 2^71940229 is an apocalyptic number.

It is an amenable number.

71940229 is a deficient number, since it is larger than the sum of its proper divisors (1).

71940229 is an equidigital number, since it uses as much as digits as its factorization.

71940229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 71940229 is about 8481.7586030257. The cubic root of 71940229 is about 415.9016135826.

The spelling of 71940229 in words is "seventy-one million, nine hundred forty thousand, two hundred twenty-nine".