71103391 has 2 divisors, whose sum is σ = 71103392. Its totient is φ = 71103390.

The previous prime is 71103341. The next prime is 71103421. The reversal of 71103391 is 19330117.

It is a strong prime.

It is an emirp because it is prime and its reverse (19330117) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71103391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71103311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35551695 + 35551696.

It is an arithmetic number, because the mean of its divisors is an integer number (35551696).

Almost surely, 2^71103391 is an apocalyptic number.

71103391 is a deficient number, since it is larger than the sum of its proper divisors (1).

71103391 is an equidigital number, since it uses as much as digits as its factorization.

71103391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 71103391 is about 8432.2826684119. The cubic root of 71103391 is about 414.2826743053.

It can be divided in two parts, 7110 and 3391, that added together give a palindrome (10501).

The spelling of 71103391 in words is "seventy-one million, one hundred three thousand, three hundred ninety-one".