71740439 has 2 divisors, whose sum is σ = 71740440. Its totient is φ = 71740438.

The previous prime is 71740379. The next prime is 71740463. The reversal of 71740439 is 93404717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71740439 - 2¹⁶ = 71674903 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71740399 and 71740408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71740499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35870219 + 35870220.

It is an arithmetic number, because the mean of its divisors is an integer number (35870220).

Almost surely, 2^71740439 is an apocalyptic number.

71740439 is a deficient number, since it is larger than the sum of its proper divisors (1).

71740439 is an equidigital number, since it uses as much as digits as its factorization.

71740439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 71740439 is about 8469.9727862609. The cubic root of 71740439 is about 415.5162472655.

The spelling of 71740439 in words is "seventy-one million, seven hundred forty thousand, four hundred thirty-nine".