71380111 has 4 divisors (see below), whose sum is σ = 77869224. Its totient is φ = 64891000.

The previous prime is 71380097. The next prime is 71380121. The reversal of 71380111 is 11108317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71380111 - 2⁵ = 71380079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71380121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244540 + ... + 3244561.

It is an arithmetic number, because the mean of its divisors is an integer number (19467306).

Almost surely, 2^71380111 is an apocalyptic number.

71380111 is a deficient number, since it is larger than the sum of its proper divisors (6489113).

71380111 is a wasteful number, since it uses less digits than its factorization.

71380111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489112.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 71380111 is about 8448.6751032336. The cubic root of 71380111 is about 414.8194133731.

Adding to 71380111 its reverse (11108317), we get a palindrome (82488428).

The spelling of 71380111 in words is "seventy-one million, three hundred eighty thousand, one hundred eleven".