71918911 has 2 divisors, whose sum is σ = 71918912. Its totient is φ = 71918910.

The previous prime is 71918893. The next prime is 71918921. The reversal of 71918911 is 11981917.

It is a strong prime.

It is an emirp because it is prime and its reverse (11981917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71918911 - 2¹⁹ = 71394623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71918921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35959455 + 35959456.

It is an arithmetic number, because the mean of its divisors is an integer number (35959456).

Almost surely, 2^71918911 is an apocalyptic number.

71918911 is a deficient number, since it is larger than the sum of its proper divisors (1).

71918911 is an equidigital number, since it uses as much as digits as its factorization.

71918911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 37.

The square root of 71918911 is about 8480.5018129825. The cubic root of 71918911 is about 415.8605282416.

The spelling of 71918911 in words is "seventy-one million, nine hundred eighteen thousand, nine hundred eleven".