71711047 has 2 divisors, whose sum is σ = 71711048. Its totient is φ = 71711046.

The previous prime is 71711023. The next prime is 71711063. The reversal of 71711047 is 74011717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71711047 - 2¹¹ = 71708999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71711077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35855523 + 35855524.

It is an arithmetic number, because the mean of its divisors is an integer number (35855524).

Almost surely, 2^71711047 is an apocalyptic number.

71711047 is a deficient number, since it is larger than the sum of its proper divisors (1).

71711047 is an equidigital number, since it uses as much as digits as its factorization.

71711047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 71711047 is about 8468.2375380005. The cubic root of 71711047 is about 415.4594939571.

The spelling of 71711047 in words is "seventy-one million, seven hundred eleven thousand, forty-seven".