71690111 has 2 divisors, whose sum is σ = 71690112. Its totient is φ = 71690110.

The previous prime is 71690083. The next prime is 71690141. The reversal of 71690111 is 11109617.

It is a weak prime.

It is an emirp because it is prime and its reverse (11109617) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71690111 is a prime.

It is a Chen prime.

It is equal to p_4211639 and since 71690111 and 4211639 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71690141) 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, 35845055 + 35845056.

It is an arithmetic number, because the mean of its divisors is an integer number (35845056).

Almost surely, 2^71690111 is an apocalyptic number.

71690111 is a deficient number, since it is larger than the sum of its proper divisors (1).

71690111 is an equidigital number, since it uses as much as digits as its factorization.

71690111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 71690111 is about 8467.0012991614. The cubic root of 71690111 is about 415.4190589664.

Adding to 71690111 its reverse (11109617), we get a palindrome (82799728).

The spelling of 71690111 in words is "seventy-one million, six hundred ninety thousand, one hundred eleven".