68091711 has 4 divisors (see below), whose sum is σ = 90788952. Its totient is φ = 45394472.

The previous prime is 68091703. The next prime is 68091713. The reversal of 68091711 is 11719086.

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 68091711 - 2³ = 68091703 is a prime.

It is a super-2 number, since 2×68091711² = 9272962213815042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68091713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11348616 + ... + 11348621.

It is an arithmetic number, because the mean of its divisors is an integer number (22697238).

Almost surely, 2^68091711 is an apocalyptic number.

68091711 is a deficient number, since it is larger than the sum of its proper divisors (22697241).

68091711 is a wasteful number, since it uses less digits than its factorization.

68091711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22697240.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 68091711 is about 8251.7701737264. The cubic root of 68091711 is about 408.3489241675.

The spelling of 68091711 in words is "sixty-eight million, ninety-one thousand, seven hundred eleven".