11197861 has 4 divisors (see below), whose sum is σ = 11205324. Its totient is φ = 11190400.

The previous prime is 11197847. The next prime is 11197873. The reversal of 11197861 is 16879111.

11197861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16879111 = 439 ⋅38449.

It can be written as a sum of positive squares in 2 ways, for example, as 3940225 + 7257636 = 1985^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 11197861 - 2⁵ = 11197829 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 (11197801) 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, 610 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (2801331).

Almost surely, 2^11197861 is an apocalyptic number.

It is an amenable number.

11197861 is a deficient number, since it is larger than the sum of its proper divisors (7463).

11197861 is an equidigital number, since it uses as much as digits as its factorization.

11197861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7462.

The product of its digits is 3024, while the sum is 34.

The square root of 11197861 is about 3346.3205166272. The cubic root of 11197861 is about 223.7235442020.

The spelling of 11197861 in words is "eleven million, one hundred ninety-seven thousand, eight hundred sixty-one".