71130439 has 2 divisors, whose sum is σ = 71130440. Its totient is φ = 71130438.

The previous prime is 71130413. The next prime is 71130469. The reversal of 71130439 is 93403117.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71130439 - 2²¹ = 69033287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71130469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35565219 + 35565220.

It is an arithmetic number, because the mean of its divisors is an integer number (35565220).

Almost surely, 2^71130439 is an apocalyptic number.

71130439 is a deficient number, since it is larger than the sum of its proper divisors (1).

71130439 is an equidigital number, since it uses as much as digits as its factorization.

71130439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 71130439 is about 8433.8863520918. The cubic root of 71130439 is about 414.3351992133.

The spelling of 71130439 in words is "seventy-one million, one hundred thirty thousand, four hundred thirty-nine".