71419409 has 2 divisors, whose sum is σ = 71419410. Its totient is φ = 71419408.

The previous prime is 71419391. The next prime is 71419427. The reversal of 71419409 is 90491417.

It is a balanced prime because it is at equal distance from previous prime (71419391) and next prime (71419427).

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 67600 = 8447^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 71419409 - 2²⁴ = 54642193 is a prime.

It is not a weakly prime, because it can be changed into another prime (71419459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35709704 + 35709705.

It is an arithmetic number, because the mean of its divisors is an integer number (35709705).

Almost surely, 2^71419409 is an apocalyptic number.

It is an amenable number.

71419409 is a deficient number, since it is larger than the sum of its proper divisors (1).

71419409 is an equidigital number, since it uses as much as digits as its factorization.

71419409 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 35.

The square root of 71419409 is about 8451.0004733168. Note that the first 3 decimals coincide. The cubic root of 71419409 is about 414.8955250630.

The spelling of 71419409 in words is "seventy-one million, four hundred nineteen thousand, four hundred nine".