71904229 has 2 divisors, whose sum is σ = 71904230. Its totient is φ = 71904228.

The previous prime is 71904211. The next prime is 71904263. The reversal of 71904229 is 92240917.

It is a happy number.

It is an a-pointer prime, because the next prime (71904263) can be obtained adding 71904229 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 248004 = 8465^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 71904229 - 2¹⁷ = 71773157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71904194 and 71904203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71904029) 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, 35952114 + 35952115.

It is an arithmetic number, because the mean of its divisors is an integer number (35952115).

Almost surely, 2^71904229 is an apocalyptic number.

It is an amenable number.

71904229 is a deficient number, since it is larger than the sum of its proper divisors (1).

71904229 is an equidigital number, since it uses as much as digits as its factorization.

71904229 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 71904229 is about 8479.6361360615. The cubic root of 71904229 is about 415.8322274803.

The spelling of 71904229 in words is "seventy-one million, nine hundred four thousand, two hundred twenty-nine".