71709413 has 2 divisors, whose sum is σ = 71709414. Its totient is φ = 71709412.

The previous prime is 71709409. The next prime is 71709419. The reversal of 71709413 is 31490717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 357604 = 8447^2 + 598^2 .

It is a cyclic number.

It is not a de Polignac number, because 71709413 - 2² = 71709409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71709413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71709419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35854706 + 35854707.

It is an arithmetic number, because the mean of its divisors is an integer number (35854707).

Almost surely, 2^71709413 is an apocalyptic number.

It is an amenable number.

71709413 is a deficient number, since it is larger than the sum of its proper divisors (1).

71709413 is an equidigital number, since it uses as much as digits as its factorization.

71709413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71709413 is about 8468.1410592880. The cubic root of 71709413 is about 415.4563383951.

The spelling of 71709413 in words is "seventy-one million, seven hundred nine thousand, four hundred thirteen".