11197391 has 4 divisors (see below), whose sum is σ = 11233032. Its totient is φ = 11161752.

The previous prime is 11197379. The next prime is 11197411. The reversal of 11197391 is 19379111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19379111 = 43 ⋅450677.

It is a cyclic number.

It is not a de Polignac number, because 11197391 - 2¹⁴ = 11181007 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 (11197301) 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, 17345 + ... + 17978.

It is an arithmetic number, because the mean of its divisors is an integer number (2808258).

Almost surely, 2^11197391 is an apocalyptic number.

11197391 is a deficient number, since it is larger than the sum of its proper divisors (35641).

11197391 is an equidigital number, since it uses as much as digits as its factorization.

11197391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35640.

The product of its digits is 1701, while the sum is 32.

The square root of 11197391 is about 3346.2502895032. The cubic root of 11197391 is about 223.7204140942.

The spelling of 11197391 in words is "eleven million, one hundred ninety-seven thousand, three hundred ninety-one".