71100389 has 2 divisors, whose sum is σ = 71100390. Its totient is φ = 71100388.

The previous prime is 71100377. The next prime is 71100427. The reversal of 71100389 is 98300117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36784225 + 34316164 = 6065^2 + 5858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71100389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71105389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35550194 + 35550195.

It is an arithmetic number, because the mean of its divisors is an integer number (35550195).

Almost surely, 2^71100389 is an apocalyptic number.

It is an amenable number.

71100389 is a deficient number, since it is larger than the sum of its proper divisors (1).

71100389 is an equidigital number, since it uses as much as digits as its factorization.

71100389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 71100389 is about 8432.1046601664. The cubic root of 71100389 is about 414.2768438563.

The spelling of 71100389 in words is "seventy-one million, one hundred thousand, three hundred eighty-nine".