1368991711 has 4 divisors (see below), whose sum is σ = 1386320800. Its totient is φ = 1351662624.

The previous prime is 1368991697. The next prime is 1368991727. The reversal of 1368991711 is 1171998631.

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 1368991711 - 2⁹ = 1368991199 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 (1368901711) 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, 8664426 + ... + 8664583.

It is an arithmetic number, because the mean of its divisors is an integer number (346580200).

Almost surely, 2^1368991711 is an apocalyptic number.

1368991711 is a deficient number, since it is larger than the sum of its proper divisors (17329089).

1368991711 is an equidigital number, since it uses as much as digits as its factorization.

1368991711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17329088.

The product of its digits is 81648, while the sum is 46.

The square root of 1368991711 is about 36999.8879863169. The cubic root of 1368991711 is about 1110.3680058366.

The spelling of 1368991711 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-one thousand, seven hundred eleven".