71712811 has 2 divisors, whose sum is σ = 71712812. Its totient is φ = 71712810.

The previous prime is 71712761. The next prime is 71712829. The reversal of 71712811 is 11821717.

It is a strong prime.

It is an emirp because it is prime and its reverse (11821717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71712811 - 2¹⁵ = 71680043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71712811.

It is not a weakly prime, because it can be changed into another prime (71712871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35856405 + 35856406.

It is an arithmetic number, because the mean of its divisors is an integer number (35856406).

Almost surely, 2^71712811 is an apocalyptic number.

71712811 is a deficient number, since it is larger than the sum of its proper divisors (1).

71712811 is an equidigital number, since it uses as much as digits as its factorization.

71712811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784, while the sum is 28.

The square root of 71712811 is about 8468.3416912640. The cubic root of 71712811 is about 415.4629005198.

The spelling of 71712811 in words is "seventy-one million, seven hundred twelve thousand, eight hundred eleven".