11711391 has 8 divisors (see below), whose sum is σ = 16437120. Its totient is φ = 7396632.

The previous prime is 11711377. The next prime is 11711407. The reversal of 11711391 is 19311711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11711391 - 2⁷ = 11711263 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11711311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102675 + ... + 102788.

It is an arithmetic number, because the mean of its divisors is an integer number (2054640).

Almost surely, 2^11711391 is an apocalyptic number.

11711391 is a deficient number, since it is larger than the sum of its proper divisors (4725729).

11711391 is a wasteful number, since it uses less digits than its factorization.

11711391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205485.

The product of its digits is 189, while the sum is 24.

The square root of 11711391 is about 3422.1909648645. The cubic root of 11711391 is about 227.0925185822.

The spelling of 11711391 in words is "eleven million, seven hundred eleven thousand, three hundred ninety-one".