71285723 has 2 divisors, whose sum is σ = 71285724. Its totient is φ = 71285722.

The previous prime is 71285681. The next prime is 71285749. The reversal of 71285723 is 32758217.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71285723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (71285023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35642861 + 35642862.

It is an arithmetic number, because the mean of its divisors is an integer number (35642862).

Almost surely, 2^71285723 is an apocalyptic number.

71285723 is a deficient number, since it is larger than the sum of its proper divisors (1).

71285723 is an equidigital number, since it uses as much as digits as its factorization.

71285723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 71285723 is about 8443.0872907959. The cubic root of 71285723 is about 414.6364901233.

The spelling of 71285723 in words is "seventy-one million, two hundred eighty-five thousand, seven hundred twenty-three".