71457811 has 2 divisors, whose sum is σ = 71457812. Its totient is φ = 71457810.

The previous prime is 71457809. The next prime is 71457829. The reversal of 71457811 is 11875417.

It is a weak prime.

It is an emirp because it is prime and its reverse (11875417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71457811 - 2¹ = 71457809 is a prime.

Together with 71457809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71457871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35728905 + 35728906.

It is an arithmetic number, because the mean of its divisors is an integer number (35728906).

Almost surely, 2^71457811 is an apocalyptic number.

71457811 is a deficient number, since it is larger than the sum of its proper divisors (1).

71457811 is an equidigital number, since it uses as much as digits as its factorization.

71457811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 71457811 is about 8453.2722066665. The cubic root of 71457811 is about 414.9698744281.

The spelling of 71457811 in words is "seventy-one million, four hundred fifty-seven thousand, eight hundred eleven".